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Finding the Fourth Proportional to 79,278.40, 109,403.76 and 43,469.92

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Solution

The fourth proportional to 79,278.40, 109,403.76 and 43,469.92 is: 59,988.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,278.40 : 109,403.76 = 43,469.92 : x
  2. Step 2: Convert to fraction form
    79,278.40/109,403.76 = 43,469.92/x
  3. Step 3: Cross multiply
    79,278.40x = 109,403.76 × 43,469.92
  4. Step 4: Simplify right side
    79,278.40x = 4,755,772,694.90
  5. Step 5: Solve for x
    x = 4,755,772,694.90/79,278.40
  6. Step 6: Final answer
    x = 59,988.25

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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.