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Finding the Fourth Proportional to 60,809.28, 91,207.50 and 28,780.68

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Solution

The fourth proportional to 60,809.28, 91,207.50 and 28,780.68 is: 43,167.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,809.28 : 91,207.50 = 28,780.68 : x
  2. Step 2: Convert to fraction form
    60,809.28/91,207.50 = 28,780.68/x
  3. Step 3: Cross multiply
    60,809.28x = 91,207.50 × 28,780.68
  4. Step 4: Simplify right side
    60,809.28x = 2,625,013,871.10
  5. Step 5: Solve for x
    x = 2,625,013,871.10/60,809.28
  6. Step 6: Final answer
    x = 43,167.98

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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.