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Finding the Fourth Proportional to 112,506.60, 168,759.90 and 81,402.60

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Solution

The fourth proportional to 112,506.60, 168,759.90 and 81,402.60 is: 122,103.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,506.60 : 168,759.90 = 81,402.60 : x
  2. Step 2: Convert to fraction form
    112,506.60/168,759.90 = 81,402.60/x
  3. Step 3: Cross multiply
    112,506.60x = 168,759.90 × 81,402.60
  4. Step 4: Simplify right side
    112,506.60x = 13,737,494,635.74
  5. Step 5: Solve for x
    x = 13,737,494,635.74/112,506.60
  6. Step 6: Final answer
    x = 122,103.90

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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.