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Finding the Fourth Proportional to 139,987.96, 193,179.18 and 76,327

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Solution

The fourth proportional to 139,987.96, 193,179.18 and 76,327 is: 105,328.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,987.96 : 193,179.18 = 76,327 : x
  2. Step 2: Convert to fraction form
    139,987.96/193,179.18 = 76,327/x
  3. Step 3: Cross multiply
    139,987.96x = 193,179.18 × 76,327
  4. Step 4: Simplify right side
    139,987.96x = 14,744,787,271.86
  5. Step 5: Solve for x
    x = 14,744,787,271.86/139,987.96
  6. Step 6: Final answer
    x = 105,328.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.