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Finding the Fourth Proportional to 78,937.38, 118,402.83 and 43,854.66

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Solution

The fourth proportional to 78,937.38, 118,402.83 and 43,854.66 is: 65,780.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,937.38 : 118,402.83 = 43,854.66 : x
  2. Step 2: Convert to fraction form
    78,937.38/118,402.83 = 43,854.66/x
  3. Step 3: Cross multiply
    78,937.38x = 118,402.83 × 43,854.66
  4. Step 4: Simplify right side
    78,937.38x = 5,192,515,852.69
  5. Step 5: Solve for x
    x = 5,192,515,852.69/78,937.38
  6. Step 6: Final answer
    x = 65,780.19

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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.