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Finding the Fourth Proportional to 84,468.60, 126,702.90 and 81,516.15

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Solution

The fourth proportional to 84,468.60, 126,702.90 and 81,516.15 is: 122,274.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,468.60 : 126,702.90 = 81,516.15 : x
  2. Step 2: Convert to fraction form
    84,468.60/126,702.90 = 81,516.15/x
  3. Step 3: Cross multiply
    84,468.60x = 126,702.90 × 81,516.15
  4. Step 4: Simplify right side
    84,468.60x = 10,328,332,601.84
  5. Step 5: Solve for x
    x = 10,328,332,601.84/84,468.60
  6. Step 6: Final answer
    x = 122,274.23

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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.