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Finding the Fourth Proportional to 112,491.60, 168,737.40 and 103,306.20

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Solution

The fourth proportional to 112,491.60, 168,737.40 and 103,306.20 is: 154,959.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,491.60 : 168,737.40 = 103,306.20 : x
  2. Step 2: Convert to fraction form
    112,491.60/168,737.40 = 103,306.20/x
  3. Step 3: Cross multiply
    112,491.60x = 168,737.40 × 103,306.20
  4. Step 4: Simplify right side
    112,491.60x = 17,431,619,591.88
  5. Step 5: Solve for x
    x = 17,431,619,591.88/112,491.60
  6. Step 6: Final answer
    x = 154,959.30

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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.