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Finding the Fourth Proportional to 71,644.78, 107,488.86 and 28,928.26

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Solution

The fourth proportional to 71,644.78, 107,488.86 and 28,928.26 is: 43,401.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,644.78 : 107,488.86 = 28,928.26 : x
  2. Step 2: Convert to fraction form
    71,644.78/107,488.86 = 28,928.26/x
  3. Step 3: Cross multiply
    71,644.78x = 107,488.86 × 28,928.26
  4. Step 4: Simplify right side
    71,644.78x = 3,109,465,689.18
  5. Step 5: Solve for x
    x = 3,109,465,689.18/71,644.78
  6. Step 6: Final answer
    x = 43,401.15

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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.