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Finding the Fourth Proportional to 71,126.80, 98,135.40 and 41,318.80

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Solution

The fourth proportional to 71,126.80, 98,135.40 and 41,318.80 is: 57,008.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,126.80 : 98,135.40 = 41,318.80 : x
  2. Step 2: Convert to fraction form
    71,126.80/98,135.40 = 41,318.80/x
  3. Step 3: Cross multiply
    71,126.80x = 98,135.40 × 41,318.80
  4. Step 4: Simplify right side
    71,126.80x = 4,054,836,965.52
  5. Step 5: Solve for x
    x = 4,054,836,965.52/71,126.80
  6. Step 6: Final answer
    x = 57,008.57

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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.