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Finding the Fourth Proportional to 72,437.80, 108,687.68 and 30,327.72

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Solution

The fourth proportional to 72,437.80, 108,687.68 and 30,327.72 is: 45,504.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,437.80 : 108,687.68 = 30,327.72 : x
  2. Step 2: Convert to fraction form
    72,437.80/108,687.68 = 30,327.72/x
  3. Step 3: Cross multiply
    72,437.80x = 108,687.68 × 30,327.72
  4. Step 4: Simplify right side
    72,437.80x = 3,296,249,526.49
  5. Step 5: Solve for x
    x = 3,296,249,526.49/72,437.80
  6. Step 6: Final answer
    x = 45,504.55

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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.