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Finding the Fourth Proportional to 123,495.55, 170,424.65 and 66,906.92

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Solution

The fourth proportional to 123,495.55, 170,424.65 and 66,906.92 is: 92,331.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,495.55 : 170,424.65 = 66,906.92 : x
  2. Step 2: Convert to fraction form
    123,495.55/170,424.65 = 66,906.92/x
  3. Step 3: Cross multiply
    123,495.55x = 170,424.65 × 66,906.92
  4. Step 4: Simplify right side
    123,495.55x = 11,402,589,016.91
  5. Step 5: Solve for x
    x = 11,402,589,016.91/123,495.55
  6. Step 6: Final answer
    x = 92,331.98

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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.