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Finding the Fourth Proportional to 79,517.78, 109,734.57 and 43,707.50

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Solution

The fourth proportional to 79,517.78, 109,734.57 and 43,707.50 is: 60,316.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,517.78 : 109,734.57 = 43,707.50 : x
  2. Step 2: Convert to fraction form
    79,517.78/109,734.57 = 43,707.50/x
  3. Step 3: Cross multiply
    79,517.78x = 109,734.57 × 43,707.50
  4. Step 4: Simplify right side
    79,517.78x = 4,796,223,718.28
  5. Step 5: Solve for x
    x = 4,796,223,718.28/79,517.78
  6. Step 6: Final answer
    x = 60,316.37

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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.