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Finding the Fourth Proportional to 89,689.80, 134,359.56 and 54,542.28

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Solution

The fourth proportional to 89,689.80, 134,359.56 and 54,542.28 is: 81,706.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,689.80 : 134,359.56 = 54,542.28 : x
  2. Step 2: Convert to fraction form
    89,689.80/134,359.56 = 54,542.28/x
  3. Step 3: Cross multiply
    89,689.80x = 134,359.56 × 54,542.28
  4. Step 4: Simplify right side
    89,689.80x = 7,328,276,742.20
  5. Step 5: Solve for x
    x = 7,328,276,742.20/89,689.80
  6. Step 6: Final answer
    x = 81,706.91

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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.