Home / 81,013.78-111,781.10-47,002.56

Finding the Fourth Proportional to 81,013.78, 111,781.10 and 47,002.56

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Solution

The fourth proportional to 81,013.78, 111,781.10 and 47,002.56 is: 64,853.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,013.78 : 111,781.10 = 47,002.56 : x
  2. Step 2: Convert to fraction form
    81,013.78/111,781.10 = 47,002.56/x
  3. Step 3: Cross multiply
    81,013.78x = 111,781.10 × 47,002.56
  4. Step 4: Simplify right side
    81,013.78x = 5,253,997,859.62
  5. Step 5: Solve for x
    x = 5,253,997,859.62/81,013.78
  6. Step 6: Final answer
    x = 64,853.14

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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.