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Finding the Fourth Proportional to 108,419.16, 149,620.68 and 65,398.44

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Solution

The fourth proportional to 108,419.16, 149,620.68 and 65,398.44 is: 90,251.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,419.16 : 149,620.68 = 65,398.44 : x
  2. Step 2: Convert to fraction form
    108,419.16/149,620.68 = 65,398.44/x
  3. Step 3: Cross multiply
    108,419.16x = 149,620.68 × 65,398.44
  4. Step 4: Simplify right side
    108,419.16x = 9,784,959,063.74
  5. Step 5: Solve for x
    x = 9,784,959,063.74/108,419.16
  6. Step 6: Final answer
    x = 90,251.20

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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.