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Finding the Fourth Proportional to 179,139.60, 268,644.60 and 72,478.80

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Solution

The fourth proportional to 179,139.60, 268,644.60 and 72,478.80 is: 108,691.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    179,139.60 : 268,644.60 = 72,478.80 : x
  2. Step 2: Convert to fraction form
    179,139.60/268,644.60 = 72,478.80/x
  3. Step 3: Cross multiply
    179,139.60x = 268,644.60 × 72,478.80
  4. Step 4: Simplify right side
    179,139.60x = 19,471,038,234.48
  5. Step 5: Solve for x
    x = 19,471,038,234.48/179,139.60
  6. Step 6: Final answer
    x = 108,691.98

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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.