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Finding the Fourth Proportional to 72,513, 108,769.50 and 25,767.72

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Solution

The fourth proportional to 72,513, 108,769.50 and 25,767.72 is: 38,651.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,513 : 108,769.50 = 25,767.72 : x
  2. Step 2: Convert to fraction form
    72,513/108,769.50 = 25,767.72/x
  3. Step 3: Cross multiply
    72,513x = 108,769.50 × 25,767.72
  4. Step 4: Simplify right side
    72,513x = 2,802,742,020.54
  5. Step 5: Solve for x
    x = 2,802,742,020.54/72,513
  6. Step 6: Final answer
    x = 38,651.58

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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.