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Finding the Fourth Proportional to 86,440.29, 129,706.89 and 83,294.87

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Solution

The fourth proportional to 86,440.29, 129,706.89 and 83,294.87 is: 124,987.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,440.29 : 129,706.89 = 83,294.87 : x
  2. Step 2: Convert to fraction form
    86,440.29/129,706.89 = 83,294.87/x
  3. Step 3: Cross multiply
    86,440.29x = 129,706.89 × 83,294.87
  4. Step 4: Simplify right side
    86,440.29x = 10,803,917,892.12
  5. Step 5: Solve for x
    x = 10,803,917,892.12/86,440.29
  6. Step 6: Final answer
    x = 124,987.06

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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.