Home / 85,832,138.80-128,748,208.20-76,426,289.20

Finding the Fourth Proportional to 85,832,138.80, 128,748,208.20 and 76,426,289.20

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Solution

The fourth proportional to 85,832,138.80, 128,748,208.20 and 76,426,289.20 is: 114,639,433.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,832,138.80 : 128,748,208.20 = 76,426,289.20 : x
  2. Step 2: Convert to fraction form
    85,832,138.80/128,748,208.20 = 76,426,289.20/x
  3. Step 3: Cross multiply
    85,832,138.80x = 128,748,208.20 × 76,426,289.20
  4. Step 4: Simplify right side
    85,832,138.80x = 9,839,747,793,875,012
  5. Step 5: Solve for x
    x = 9,839,747,793,875,012/85,832,138.80
  6. Step 6: Final answer
    x = 114,639,433.80

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1.5x scale

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.