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Finding the Fourth Proportional to 85,468.80, 128,229.09 and 60,557.04

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Solution

The fourth proportional to 85,468.80, 128,229.09 and 60,557.04 is: 90,853.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,468.80 : 128,229.09 = 60,557.04 : x
  2. Step 2: Convert to fraction form
    85,468.80/128,229.09 = 60,557.04/x
  3. Step 3: Cross multiply
    85,468.80x = 128,229.09 × 60,557.04
  4. Step 4: Simplify right side
    85,468.80x = 7,765,174,132.29
  5. Step 5: Solve for x
    x = 7,765,174,132.29/85,468.80
  6. Step 6: Final answer
    x = 90,853.90

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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.