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Finding the Fourth Proportional to 78,691.62, 108,581.73 and 46,859.70

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Solution

The fourth proportional to 78,691.62, 108,581.73 and 46,859.70 is: 64,658.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,691.62 : 108,581.73 = 46,859.70 : x
  2. Step 2: Convert to fraction form
    78,691.62/108,581.73 = 46,859.70/x
  3. Step 3: Cross multiply
    78,691.62x = 108,581.73 × 46,859.70
  4. Step 4: Simplify right side
    78,691.62x = 5,088,107,293.28
  5. Step 5: Solve for x
    x = 5,088,107,293.28/78,691.62
  6. Step 6: Final answer
    x = 64,658.82

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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.