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Finding the Fourth Proportional to 79,538.63, 109,760.49 and 43,728.39

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Solution

The fourth proportional to 79,538.63, 109,760.49 and 43,728.39 is: 60,343.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,538.63 : 109,760.49 = 43,728.39 : x
  2. Step 2: Convert to fraction form
    79,538.63/109,760.49 = 43,728.39/x
  3. Step 3: Cross multiply
    79,538.63x = 109,760.49 × 43,728.39
  4. Step 4: Simplify right side
    79,538.63x = 4,799,649,513.31
  5. Step 5: Solve for x
    x = 4,799,649,513.31/79,538.63
  6. Step 6: Final answer
    x = 60,343.63

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1.5x scale

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.