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Finding the Fourth Proportional to 171,211.80, 256,864.95 and 71,418.90

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Solution

The fourth proportional to 171,211.80, 256,864.95 and 71,418.90 is: 107,148.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,211.80 : 256,864.95 = 71,418.90 : x
  2. Step 2: Convert to fraction form
    171,211.80/256,864.95 = 71,418.90/x
  3. Step 3: Cross multiply
    171,211.80x = 256,864.95 × 71,418.90
  4. Step 4: Simplify right side
    171,211.80x = 18,345,012,177.56
  5. Step 5: Solve for x
    x = 18,345,012,177.56/171,211.80
  6. Step 6: Final answer
    x = 107,148.06

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1.5x scale

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.