Home / 428,925,400.80-643,388,101.20-118,032,415.80

Finding the Fourth Proportional to 428,925,400.80, 643,388,101.20 and 118,032,415.80

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Solution

The fourth proportional to 428,925,400.80, 643,388,101.20 and 118,032,415.80 is: 177,048,623.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,925,400.80 : 643,388,101.20 = 118,032,415.80 : x
  2. Step 2: Convert to fraction form
    428,925,400.80/643,388,101.20 = 118,032,415.80/x
  3. Step 3: Cross multiply
    428,925,400.80x = 643,388,101.20 × 118,032,415.80
  4. Step 4: Simplify right side
    428,925,400.80x = 75,940,651,881,610,880
  5. Step 5: Solve for x
    x = 75,940,651,881,610,880/428,925,400.80
  6. Step 6: Final answer
    x = 177,048,623.70

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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.