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Finding the Fourth Proportional to 72,402.60, 108,623.10 and 25,650.60

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Solution

The fourth proportional to 72,402.60, 108,623.10 and 25,650.60 is: 38,482.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,402.60 : 108,623.10 = 25,650.60 : x
  2. Step 2: Convert to fraction form
    72,402.60/108,623.10 = 25,650.60/x
  3. Step 3: Cross multiply
    72,402.60x = 108,623.10 × 25,650.60
  4. Step 4: Simplify right side
    72,402.60x = 2,786,247,688.86
  5. Step 5: Solve for x
    x = 2,786,247,688.86/72,402.60
  6. Step 6: Final answer
    x = 38,482.70

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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.