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Finding the Fourth Proportional to 72,276.80, 108,449.28 and 25,551.68

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Solution

The fourth proportional to 72,276.80, 108,449.28 and 25,551.68 is: 38,339.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,276.80 : 108,449.28 = 25,551.68 : x
  2. Step 2: Convert to fraction form
    72,276.80/108,449.28 = 25,551.68/x
  3. Step 3: Cross multiply
    72,276.80x = 108,449.28 × 25,551.68
  4. Step 4: Simplify right side
    72,276.80x = 2,771,061,298.79
  5. Step 5: Solve for x
    x = 2,771,061,298.79/72,276.80
  6. Step 6: Final answer
    x = 38,339.57

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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.