Home / 71,972.60-107,958.90-66,723.80

Finding the Fourth Proportional to 71,972.60, 107,958.90 and 66,723.80

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Solution

The fourth proportional to 71,972.60, 107,958.90 and 66,723.80 is: 100,085.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,972.60 : 107,958.90 = 66,723.80 : x
  2. Step 2: Convert to fraction form
    71,972.60/107,958.90 = 66,723.80/x
  3. Step 3: Cross multiply
    71,972.60x = 107,958.90 × 66,723.80
  4. Step 4: Simplify right side
    71,972.60x = 7,203,428,051.82
  5. Step 5: Solve for x
    x = 7,203,428,051.82/71,972.60
  6. Step 6: Final answer
    x = 100,085.70

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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.