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Finding the Fourth Proportional to 108,391.30, 149,514.51 and 71,597.74

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Solution

The fourth proportional to 108,391.30, 149,514.51 and 71,597.74 is: 98,761.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,391.30 : 149,514.51 = 71,597.74 : x
  2. Step 2: Convert to fraction form
    108,391.30/149,514.51 = 71,597.74/x
  3. Step 3: Cross multiply
    108,391.30x = 149,514.51 × 71,597.74
  4. Step 4: Simplify right side
    108,391.30x = 10,704,901,013.21
  5. Step 5: Solve for x
    x = 10,704,901,013.21/108,391.30
  6. Step 6: Final answer
    x = 98,761.63

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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.