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Finding the Fourth Proportional to 108,508.80, 149,740.80 and 66,067.20

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Solution

The fourth proportional to 108,508.80, 149,740.80 and 66,067.20 is: 91,171.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,508.80 : 149,740.80 = 66,067.20 : x
  2. Step 2: Convert to fraction form
    108,508.80/149,740.80 = 66,067.20/x
  3. Step 3: Cross multiply
    108,508.80x = 149,740.80 × 66,067.20
  4. Step 4: Simplify right side
    108,508.80x = 9,892,955,381.76
  5. Step 5: Solve for x
    x = 9,892,955,381.76/108,508.80
  6. Step 6: Final answer
    x = 91,171.92

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1.5x scale

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.