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Finding the Fourth Proportional to 268,624.60, 402,936.90 and 81,611.80

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Solution

The fourth proportional to 268,624.60, 402,936.90 and 81,611.80 is: 122,417.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,624.60 : 402,936.90 = 81,611.80 : x
  2. Step 2: Convert to fraction form
    268,624.60/402,936.90 = 81,611.80/x
  3. Step 3: Cross multiply
    268,624.60x = 402,936.90 × 81,611.80
  4. Step 4: Simplify right side
    268,624.60x = 32,884,405,695.42
  5. Step 5: Solve for x
    x = 32,884,405,695.42/268,624.60
  6. Step 6: Final answer
    x = 122,417.70

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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.