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Finding the Fourth Proportional to 79,489.62, 109,695.20 and 43,678.80

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Solution

The fourth proportional to 79,489.62, 109,695.20 and 43,678.80 is: 60,276.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,489.62 : 109,695.20 = 43,678.80 : x
  2. Step 2: Convert to fraction form
    79,489.62/109,695.20 = 43,678.80/x
  3. Step 3: Cross multiply
    79,489.62x = 109,695.20 × 43,678.80
  4. Step 4: Simplify right side
    79,489.62x = 4,791,354,483.37
  5. Step 5: Solve for x
    x = 4,791,354,483.37/79,489.62
  6. Step 6: Final answer
    x = 60,276.48

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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.