Home / 87,371,992.40-131,057,988.60-85,671,381.20

Finding the Fourth Proportional to 87,371,992.40, 131,057,988.60 and 85,671,381.20

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Solution

The fourth proportional to 87,371,992.40, 131,057,988.60 and 85,671,381.20 is: 128,507,071.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,371,992.40 : 131,057,988.60 = 85,671,381.20 : x
  2. Step 2: Convert to fraction form
    87,371,992.40/131,057,988.60 = 85,671,381.20/x
  3. Step 3: Cross multiply
    87,371,992.40x = 131,057,988.60 × 85,671,381.20
  4. Step 4: Simplify right side
    87,371,992.40x = 11,227,918,900,655,854
  5. Step 5: Solve for x
    x = 11,227,918,900,655,854/87,371,992.40
  6. Step 6: Final answer
    x = 128,507,071.80

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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.