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Finding the Fourth Proportional to 127,311.59, 175,616.89 and 79,481.90

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Solution

The fourth proportional to 127,311.59, 175,616.89 and 79,481.90 is: 109,639.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,311.59 : 175,616.89 = 79,481.90 : x
  2. Step 2: Convert to fraction form
    127,311.59/175,616.89 = 79,481.90/x
  3. Step 3: Cross multiply
    127,311.59x = 175,616.89 × 79,481.90
  4. Step 4: Simplify right side
    127,311.59x = 13,958,364,089.29
  5. Step 5: Solve for x
    x = 13,958,364,089.29/127,311.59
  6. Step 6: Final answer
    x = 109,639.38

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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.