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Finding the Fourth Proportional to 162,387.60, 243,451.80 and 68,816.40

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Solution

The fourth proportional to 162,387.60, 243,451.80 and 68,816.40 is: 103,169.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,387.60 : 243,451.80 = 68,816.40 : x
  2. Step 2: Convert to fraction form
    162,387.60/243,451.80 = 68,816.40/x
  3. Step 3: Cross multiply
    162,387.60x = 243,451.80 × 68,816.40
  4. Step 4: Simplify right side
    162,387.60x = 16,753,476,449.52
  5. Step 5: Solve for x
    x = 16,753,476,449.52/162,387.60
  6. Step 6: Final answer
    x = 103,169.68

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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.