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Finding the Fourth Proportional to 72,321.53, 108,498.65 and 39,040.88

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Solution

The fourth proportional to 72,321.53, 108,498.65 and 39,040.88 is: 58,570.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,321.53 : 108,498.65 = 39,040.88 : x
  2. Step 2: Convert to fraction form
    72,321.53/108,498.65 = 39,040.88/x
  3. Step 3: Cross multiply
    72,321.53x = 108,498.65 × 39,040.88
  4. Step 4: Simplify right side
    72,321.53x = 4,235,882,037.11
  5. Step 5: Solve for x
    x = 4,235,882,037.11/72,321.53
  6. Step 6: Final answer
    x = 58,570.14

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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.