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Finding the Fourth Proportional to 123,078.92, 169,889.28 and 74,683.04

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Solution

The fourth proportional to 123,078.92, 169,889.28 and 74,683.04 is: 103,087.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,078.92 : 169,889.28 = 74,683.04 : x
  2. Step 2: Convert to fraction form
    123,078.92/169,889.28 = 74,683.04/x
  3. Step 3: Cross multiply
    123,078.92x = 169,889.28 × 74,683.04
  4. Step 4: Simplify right side
    123,078.92x = 12,687,847,893.81
  5. Step 5: Solve for x
    x = 12,687,847,893.81/123,078.92
  6. Step 6: Final answer
    x = 103,087.09

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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.