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Finding the Fourth Proportional to 78,818.70, 118,228.05 and 74,153.10

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Solution

The fourth proportional to 78,818.70, 118,228.05 and 74,153.10 is: 111,229.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,818.70 : 118,228.05 = 74,153.10 : x
  2. Step 2: Convert to fraction form
    78,818.70/118,228.05 = 74,153.10/x
  3. Step 3: Cross multiply
    78,818.70x = 118,228.05 × 74,153.10
  4. Step 4: Simplify right side
    78,818.70x = 8,766,976,414.46
  5. Step 5: Solve for x
    x = 8,766,976,414.46/78,818.70
  6. Step 6: Final answer
    x = 111,229.65

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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.