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Finding the Fourth Proportional to 71,560.26, 107,319.60 and 28,865.70

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Solution

The fourth proportional to 71,560.26, 107,319.60 and 28,865.70 is: 43,290.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,560.26 : 107,319.60 = 28,865.70 : x
  2. Step 2: Convert to fraction form
    71,560.26/107,319.60 = 28,865.70/x
  3. Step 3: Cross multiply
    71,560.26x = 107,319.60 × 28,865.70
  4. Step 4: Simplify right side
    71,560.26x = 3,097,855,377.72
  5. Step 5: Solve for x
    x = 3,097,855,377.72/71,560.26
  6. Step 6: Final answer
    x = 43,290.16

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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.