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Finding the Fourth Proportional to 71,953.60, 107,930.40 and 66,704.80

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Solution

The fourth proportional to 71,953.60, 107,930.40 and 66,704.80 is: 100,057.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,953.60 : 107,930.40 = 66,704.80 : x
  2. Step 2: Convert to fraction form
    71,953.60/107,930.40 = 66,704.80/x
  3. Step 3: Cross multiply
    71,953.60x = 107,930.40 × 66,704.80
  4. Step 4: Simplify right side
    71,953.60x = 7,199,475,745.92
  5. Step 5: Solve for x
    x = 7,199,475,745.92/71,953.60
  6. Step 6: Final answer
    x = 100,057.20

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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.