Home / 428,839,525,028.80-643,108,946,863.52-126,571,476,707.20

Finding the Fourth Proportional to 428,839,525,028.80, 643,108,946,863.52 and 126,571,476,707.20

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Solution

The fourth proportional to 428,839,525,028.80, 643,108,946,863.52 and 126,571,476,707.20 is: 189,812,842,187.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,839,525,028.80 : 643,108,946,863.52 = 126,571,476,707.20 : x
  2. Step 2: Convert to fraction form
    428,839,525,028.80/643,108,946,863.52 = 126,571,476,707.20/x
  3. Step 3: Cross multiply
    428,839,525,028.80x = 643,108,946,863.52 × 126,571,476,707.20
  4. Step 4: Simplify right side
    428,839,525,028.80x = 81,399,249,088,127,938,068,480
  5. Step 5: Solve for x
    x = 81,399,249,088,127,938,068,480/428,839,525,028.80
  6. Step 6: Final answer
    x = 189,812,842,187.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.