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Finding the Fourth Proportional to 62,857.80, 86,722.18 and 38,975.88

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Solution

The fourth proportional to 62,857.80, 86,722.18 and 38,975.88 is: 53,773.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,857.80 : 86,722.18 = 38,975.88 : x
  2. Step 2: Convert to fraction form
    62,857.80/86,722.18 = 38,975.88/x
  3. Step 3: Cross multiply
    62,857.80x = 86,722.18 × 38,975.88
  4. Step 4: Simplify right side
    62,857.80x = 3,380,073,281.02
  5. Step 5: Solve for x
    x = 3,380,073,281.02/62,857.80
  6. Step 6: Final answer
    x = 53,773.33

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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.