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Finding the Fourth Proportional to 78,912.55, 118,385.39 and 22,752.55

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Solution

The fourth proportional to 78,912.55, 118,385.39 and 22,752.55 is: 34,133.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,912.55 : 118,385.39 = 22,752.55 : x
  2. Step 2: Convert to fraction form
    78,912.55/118,385.39 = 22,752.55/x
  3. Step 3: Cross multiply
    78,912.55x = 118,385.39 × 22,752.55
  4. Step 4: Simplify right side
    78,912.55x = 2,693,569,391.48
  5. Step 5: Solve for x
    x = 2,693,569,391.48/78,912.55
  6. Step 6: Final answer
    x = 34,133.60

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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.