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Finding the Fourth Proportional to 123,079.42, 169,889.97 and 74,683.54

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Solution

The fourth proportional to 123,079.42, 169,889.97 and 74,683.54 is: 103,087.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,079.42 : 169,889.97 = 74,683.54 : x
  2. Step 2: Convert to fraction form
    123,079.42/169,889.97 = 74,683.54/x
  3. Step 3: Cross multiply
    123,079.42x = 169,889.97 × 74,683.54
  4. Step 4: Simplify right side
    123,079.42x = 12,687,984,370.09
  5. Step 5: Solve for x
    x = 12,687,984,370.09/123,079.42
  6. Step 6: Final answer
    x = 103,087.78

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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.