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Finding the Fourth Proportional to 108,713.44, 149,972.88 and 72,431.74

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Solution

The fourth proportional to 108,713.44, 149,972.88 and 72,431.74 is: 99,921.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,713.44 : 149,972.88 = 72,431.74 : x
  2. Step 2: Convert to fraction form
    108,713.44/149,972.88 = 72,431.74/x
  3. Step 3: Cross multiply
    108,713.44x = 149,972.88 × 72,431.74
  4. Step 4: Simplify right side
    108,713.44x = 10,862,796,651.21
  5. Step 5: Solve for x
    x = 10,862,796,651.21/108,713.44
  6. Step 6: Final answer
    x = 99,921.38

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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.