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Finding the Fourth Proportional to 108,718.21, 150,032.66 and 65,691.73

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Solution

The fourth proportional to 108,718.21, 150,032.66 and 65,691.73 is: 90,655.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,718.21 : 150,032.66 = 65,691.73 : x
  2. Step 2: Convert to fraction form
    108,718.21/150,032.66 = 65,691.73/x
  3. Step 3: Cross multiply
    108,718.21x = 150,032.66 × 65,691.73
  4. Step 4: Simplify right side
    108,718.21x = 9,855,904,991.90
  5. Step 5: Solve for x
    x = 9,855,904,991.90/108,718.21
  6. Step 6: Final answer
    x = 90,655.51

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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.