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Finding the Fourth Proportional to 79,138.32, 118,719.18 and 22,978.86

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Solution

The fourth proportional to 79,138.32, 118,719.18 and 22,978.86 is: 34,471.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,138.32 : 118,719.18 = 22,978.86 : x
  2. Step 2: Convert to fraction form
    79,138.32/118,719.18 = 22,978.86/x
  3. Step 3: Cross multiply
    79,138.32x = 118,719.18 × 22,978.86
  4. Step 4: Simplify right side
    79,138.32x = 2,728,031,416.53
  5. Step 5: Solve for x
    x = 2,728,031,416.53/79,138.32
  6. Step 6: Final answer
    x = 34,471.69

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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.