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Finding the Fourth Proportional to 139,468.60, 192,451.98 and 82,872.28

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Solution

The fourth proportional to 139,468.60, 192,451.98 and 82,872.28 is: 114,355.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,468.60 : 192,451.98 = 82,872.28 : x
  2. Step 2: Convert to fraction form
    139,468.60/192,451.98 = 82,872.28/x
  3. Step 3: Cross multiply
    139,468.60x = 192,451.98 × 82,872.28
  4. Step 4: Simplify right side
    139,468.60x = 15,948,934,373.11
  5. Step 5: Solve for x
    x = 15,948,934,373.11/139,468.60
  6. Step 6: Final answer
    x = 114,355.02

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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.