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Finding the Fourth Proportional to 108,456.65, 162,473.11 and 74,716.71

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Solution

The fourth proportional to 108,456.65, 162,473.11 and 74,716.71 is: 111,929.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,456.65 : 162,473.11 = 74,716.71 : x
  2. Step 2: Convert to fraction form
    108,456.65/162,473.11 = 74,716.71/x
  3. Step 3: Cross multiply
    108,456.65x = 162,473.11 × 74,716.71
  4. Step 4: Simplify right side
    108,456.65x = 12,139,455,446.60
  5. Step 5: Solve for x
    x = 12,139,455,446.60/108,456.65
  6. Step 6: Final answer
    x = 111,929.10

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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.