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Finding the Fourth Proportional to 72,505.68, 108,629.88 and 30,292.93

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Solution

The fourth proportional to 72,505.68, 108,629.88 and 30,292.93 is: 45,385.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,505.68 : 108,629.88 = 30,292.93 : x
  2. Step 2: Convert to fraction form
    72,505.68/108,629.88 = 30,292.93/x
  3. Step 3: Cross multiply
    72,505.68x = 108,629.88 × 30,292.93
  4. Step 4: Simplify right side
    72,505.68x = 3,290,717,350.75
  5. Step 5: Solve for x
    x = 3,290,717,350.75/72,505.68
  6. Step 6: Final answer
    x = 45,385.65

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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.