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Finding the Fourth Proportional to 108,459.23, 149,691.65 and 74,439.77

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Solution

The fourth proportional to 108,459.23, 149,691.65 and 74,439.77 is: 102,739.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,459.23 : 149,691.65 = 74,439.77 : x
  2. Step 2: Convert to fraction form
    108,459.23/149,691.65 = 74,439.77/x
  3. Step 3: Cross multiply
    108,459.23x = 149,691.65 × 74,439.77
  4. Step 4: Simplify right side
    108,459.23x = 11,143,010,876.26
  5. Step 5: Solve for x
    x = 11,143,010,876.26/108,459.23
  6. Step 6: Final answer
    x = 102,739.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.