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Finding the Fourth Proportional to 72,488.88, 108,731.97 and 29,785.32

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Solution

The fourth proportional to 72,488.88, 108,731.97 and 29,785.32 is: 44,677.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,488.88 : 108,731.97 = 29,785.32 : x
  2. Step 2: Convert to fraction form
    72,488.88/108,731.97 = 29,785.32/x
  3. Step 3: Cross multiply
    72,488.88x = 108,731.97 × 29,785.32
  4. Step 4: Simplify right side
    72,488.88x = 3,238,616,520.68
  5. Step 5: Solve for x
    x = 3,238,616,520.68/72,488.88
  6. Step 6: Final answer
    x = 44,677.43

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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.