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Finding the Fourth Proportional to 71,142.93, 98,178.39 and 39,311.82

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Solution

The fourth proportional to 71,142.93, 98,178.39 and 39,311.82 is: 54,250.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,142.93 : 98,178.39 = 39,311.82 : x
  2. Step 2: Convert to fraction form
    71,142.93/98,178.39 = 39,311.82/x
  3. Step 3: Cross multiply
    71,142.93x = 98,178.39 × 39,311.82
  4. Step 4: Simplify right side
    71,142.93x = 3,859,571,195.57
  5. Step 5: Solve for x
    x = 3,859,571,195.57/71,142.93
  6. Step 6: Final answer
    x = 54,250.95

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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.