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Finding the Fourth Proportional to 71,291.26, 98,380.46 and 39,458.26

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Solution

The fourth proportional to 71,291.26, 98,380.46 and 39,458.26 is: 54,451.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,291.26 : 98,380.46 = 39,458.26 : x
  2. Step 2: Convert to fraction form
    71,291.26/98,380.46 = 39,458.26/x
  3. Step 3: Cross multiply
    71,291.26x = 98,380.46 × 39,458.26
  4. Step 4: Simplify right side
    71,291.26x = 3,881,921,769.60
  5. Step 5: Solve for x
    x = 3,881,921,769.60/71,291.26
  6. Step 6: Final answer
    x = 54,451.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.