Home / 86,721.70-129,996.15-39,892.90

Finding the Fourth Proportional to 86,721.70, 129,996.15 and 39,892.90

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Solution

The fourth proportional to 86,721.70, 129,996.15 and 39,892.90 is: 59,799.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,721.70 : 129,996.15 = 39,892.90 : x
  2. Step 2: Convert to fraction form
    86,721.70/129,996.15 = 39,892.90/x
  3. Step 3: Cross multiply
    86,721.70x = 129,996.15 × 39,892.90
  4. Step 4: Simplify right side
    86,721.70x = 5,185,923,412.34
  5. Step 5: Solve for x
    x = 5,185,923,412.34/86,721.70
  6. Step 6: Final answer
    x = 59,799.61

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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.