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Finding the Fourth Proportional to 72,515, 108,772.50 and 25,769.72

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Solution

The fourth proportional to 72,515, 108,772.50 and 25,769.72 is: 38,654.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,515 : 108,772.50 = 25,769.72 : x
  2. Step 2: Convert to fraction form
    72,515/108,772.50 = 25,769.72/x
  3. Step 3: Cross multiply
    72,515x = 108,772.50 × 25,769.72
  4. Step 4: Simplify right side
    72,515x = 2,803,036,868.70
  5. Step 5: Solve for x
    x = 2,803,036,868.70/72,515
  6. Step 6: Final answer
    x = 38,654.58

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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.