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Finding the Fourth Proportional to 86,637.90, 129,760.02 and 67,800.54

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Solution

The fourth proportional to 86,637.90, 129,760.02 and 67,800.54 is: 101,546.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,637.90 : 129,760.02 = 67,800.54 : x
  2. Step 2: Convert to fraction form
    86,637.90/129,760.02 = 67,800.54/x
  3. Step 3: Cross multiply
    86,637.90x = 129,760.02 × 67,800.54
  4. Step 4: Simplify right side
    86,637.90x = 8,797,799,426.41
  5. Step 5: Solve for x
    x = 8,797,799,426.41/86,637.90
  6. Step 6: Final answer
    x = 101,546.78

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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.