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Finding the Fourth Proportional to 79,538.80, 109,762.02 and 43,728.46

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Solution

The fourth proportional to 79,538.80, 109,762.02 and 43,728.46 is: 60,344.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,538.80 : 109,762.02 = 43,728.46 : x
  2. Step 2: Convert to fraction form
    79,538.80/109,762.02 = 43,728.46/x
  3. Step 3: Cross multiply
    79,538.80x = 109,762.02 × 43,728.46
  4. Step 4: Simplify right side
    79,538.80x = 4,799,724,101.09
  5. Step 5: Solve for x
    x = 4,799,724,101.09/79,538.80
  6. Step 6: Final answer
    x = 60,344.44

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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.