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Finding the Fourth Proportional to 79,406.76, 109,582.60 and 43,600

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Solution

The fourth proportional to 79,406.76, 109,582.60 and 43,600 is: 60,168.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,406.76 : 109,582.60 = 43,600 : x
  2. Step 2: Convert to fraction form
    79,406.76/109,582.60 = 43,600/x
  3. Step 3: Cross multiply
    79,406.76x = 109,582.60 × 43,600
  4. Step 4: Simplify right side
    79,406.76x = 4,777,801,360
  5. Step 5: Solve for x
    x = 4,777,801,360/79,406.76
  6. Step 6: Final answer
    x = 60,168.70

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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.