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Finding the Fourth Proportional to 98,785.28, 136,326.88 and 54,073.28

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Solution

The fourth proportional to 98,785.28, 136,326.88 and 54,073.28 is: 74,622.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,785.28 : 136,326.88 = 54,073.28 : x
  2. Step 2: Convert to fraction form
    98,785.28/136,326.88 = 54,073.28/x
  3. Step 3: Cross multiply
    98,785.28x = 136,326.88 × 54,073.28
  4. Step 4: Simplify right side
    98,785.28x = 7,371,641,553.77
  5. Step 5: Solve for x
    x = 7,371,641,553.77/98,785.28
  6. Step 6: Final answer
    x = 74,622.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.