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Finding the Fourth Proportional to 72,387.60, 108,586.80 and 25,634.40

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Solution

The fourth proportional to 72,387.60, 108,586.80 and 25,634.40 is: 38,453.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,387.60 : 108,586.80 = 25,634.40 : x
  2. Step 2: Convert to fraction form
    72,387.60/108,586.80 = 25,634.40/x
  3. Step 3: Cross multiply
    72,387.60x = 108,586.80 × 25,634.40
  4. Step 4: Simplify right side
    72,387.60x = 2,783,557,465.92
  5. Step 5: Solve for x
    x = 2,783,557,465.92/72,387.60
  6. Step 6: Final answer
    x = 38,453.51

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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.