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Finding the Fourth Proportional to 72,748.80, 108,986.40 and 41,489.28

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Solution

The fourth proportional to 72,748.80, 108,986.40 and 41,489.28 is: 62,155.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,748.80 : 108,986.40 = 41,489.28 : x
  2. Step 2: Convert to fraction form
    72,748.80/108,986.40 = 41,489.28/x
  3. Step 3: Cross multiply
    72,748.80x = 108,986.40 × 41,489.28
  4. Step 4: Simplify right side
    72,748.80x = 4,521,767,265.79
  5. Step 5: Solve for x
    x = 4,521,767,265.79/72,748.80
  6. Step 6: Final answer
    x = 62,155.90

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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.