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Finding the Fourth Proportional to 85,127.70, 127,691.55 and 75,942.30

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Solution

The fourth proportional to 85,127.70, 127,691.55 and 75,942.30 is: 113,913.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,127.70 : 127,691.55 = 75,942.30 : x
  2. Step 2: Convert to fraction form
    85,127.70/127,691.55 = 75,942.30/x
  3. Step 3: Cross multiply
    85,127.70x = 127,691.55 × 75,942.30
  4. Step 4: Simplify right side
    85,127.70x = 9,697,189,997.57
  5. Step 5: Solve for x
    x = 9,697,189,997.57/85,127.70
  6. Step 6: Final answer
    x = 113,913.45

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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.