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Finding the Fourth Proportional to 123,502.61, 170,433.62 and 66,913.98

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Solution

The fourth proportional to 123,502.61, 170,433.62 and 66,913.98 is: 92,341.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,502.61 : 170,433.62 = 66,913.98 : x
  2. Step 2: Convert to fraction form
    123,502.61/170,433.62 = 66,913.98/x
  3. Step 3: Cross multiply
    123,502.61x = 170,433.62 × 66,913.98
  4. Step 4: Simplify right side
    123,502.61x = 11,404,391,505.44
  5. Step 5: Solve for x
    x = 11,404,391,505.44/123,502.61
  6. Step 6: Final answer
    x = 92,341.30

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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.