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Finding the Fourth Proportional to 72,502.31, 108,765.50 and 30,385.56

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Solution

The fourth proportional to 72,502.31, 108,765.50 and 30,385.56 is: 45,583.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,502.31 : 108,765.50 = 30,385.56 : x
  2. Step 2: Convert to fraction form
    72,502.31/108,765.50 = 30,385.56/x
  3. Step 3: Cross multiply
    72,502.31x = 108,765.50 × 30,385.56
  4. Step 4: Simplify right side
    72,502.31x = 3,304,900,220.79
  5. Step 5: Solve for x
    x = 3,304,900,220.79/72,502.31
  6. Step 6: Final answer
    x = 45,583.38

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1.5x scale

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.