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Finding the Fourth Proportional to 85,310.60, 127,965.90 and 79,089.80

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Solution

The fourth proportional to 85,310.60, 127,965.90 and 79,089.80 is: 118,634.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,310.60 : 127,965.90 = 79,089.80 : x
  2. Step 2: Convert to fraction form
    85,310.60/127,965.90 = 79,089.80/x
  3. Step 3: Cross multiply
    85,310.60x = 127,965.90 × 79,089.80
  4. Step 4: Simplify right side
    85,310.60x = 10,120,797,437.82
  5. Step 5: Solve for x
    x = 10,120,797,437.82/85,310.60
  6. Step 6: Final answer
    x = 118,634.70

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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.