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Finding the Fourth Proportional to 72,610.10, 108,920.55 and 25,856.90

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Solution

The fourth proportional to 72,610.10, 108,920.55 and 25,856.90 is: 38,787.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,610.10 : 108,920.55 = 25,856.90 : x
  2. Step 2: Convert to fraction form
    72,610.10/108,920.55 = 25,856.90/x
  3. Step 3: Cross multiply
    72,610.10x = 108,920.55 × 25,856.90
  4. Step 4: Simplify right side
    72,610.10x = 2,816,347,769.30
  5. Step 5: Solve for x
    x = 2,816,347,769.30/72,610.10
  6. Step 6: Final answer
    x = 38,787.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.