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Finding the Fourth Proportional to 60,772.80, 91,159.20 and 54,091.20

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Solution

The fourth proportional to 60,772.80, 91,159.20 and 54,091.20 is: 81,136.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,772.80 : 91,159.20 = 54,091.20 : x
  2. Step 2: Convert to fraction form
    60,772.80/91,159.20 = 54,091.20/x
  3. Step 3: Cross multiply
    60,772.80x = 91,159.20 × 54,091.20
  4. Step 4: Simplify right side
    60,772.80x = 4,930,910,519.04
  5. Step 5: Solve for x
    x = 4,930,910,519.04/60,772.80
  6. Step 6: Final answer
    x = 81,136.80

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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.