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Finding the Fourth Proportional to 71,377.20, 107,065.80 and 38,199.60

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Solution

The fourth proportional to 71,377.20, 107,065.80 and 38,199.60 is: 57,299.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,377.20 : 107,065.80 = 38,199.60 : x
  2. Step 2: Convert to fraction form
    71,377.20/107,065.80 = 38,199.60/x
  3. Step 3: Cross multiply
    71,377.20x = 107,065.80 × 38,199.60
  4. Step 4: Simplify right side
    71,377.20x = 4,089,870,733.68
  5. Step 5: Solve for x
    x = 4,089,870,733.68/71,377.20
  6. Step 6: Final answer
    x = 57,299.40

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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.