Home / 87,371,991.40-131,057,987.10-85,671,380.20

Finding the Fourth Proportional to 87,371,991.40, 131,057,987.10 and 85,671,380.20

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Solution

The fourth proportional to 87,371,991.40, 131,057,987.10 and 85,671,380.20 is: 128,507,070.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,371,991.40 : 131,057,987.10 = 85,671,380.20 : x
  2. Step 2: Convert to fraction form
    87,371,991.40/131,057,987.10 = 85,671,380.20/x
  3. Step 3: Cross multiply
    87,371,991.40x = 131,057,987.10 × 85,671,380.20
  4. Step 4: Simplify right side
    87,371,991.40x = 11,227,918,641,090,796
  5. Step 5: Solve for x
    x = 11,227,918,641,090,796/87,371,991.40
  6. Step 6: Final answer
    x = 128,507,070.30

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Similar ratio
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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.