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Finding the Fourth Proportional to 78,800.70, 118,287.45 and 49,251.90

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Solution

The fourth proportional to 78,800.70, 118,287.45 and 49,251.90 is: 73,931.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,800.70 : 118,287.45 = 49,251.90 : x
  2. Step 2: Convert to fraction form
    78,800.70/118,287.45 = 49,251.90/x
  3. Step 3: Cross multiply
    78,800.70x = 118,287.45 × 49,251.90
  4. Step 4: Simplify right side
    78,800.70x = 5,825,881,658.66
  5. Step 5: Solve for x
    x = 5,825,881,658.66/78,800.70
  6. Step 6: Final answer
    x = 73,931.85

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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.