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Finding the Fourth Proportional to 72,443.26, 108,655.66 and 28,039.64

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Solution

The fourth proportional to 72,443.26, 108,655.66 and 28,039.64 is: 42,055.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,443.26 : 108,655.66 = 28,039.64 : x
  2. Step 2: Convert to fraction form
    72,443.26/108,655.66 = 28,039.64/x
  3. Step 3: Cross multiply
    72,443.26x = 108,655.66 × 28,039.64
  4. Step 4: Simplify right side
    72,443.26x = 3,046,665,082.13
  5. Step 5: Solve for x
    x = 3,046,665,082.13/72,443.26
  6. Step 6: Final answer
    x = 42,055.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.