Home / 81,011.78-111,778.35-47,000.55

Finding the Fourth Proportional to 81,011.78, 111,778.35 and 47,000.55

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Solution

The fourth proportional to 81,011.78, 111,778.35 and 47,000.55 is: 64,850.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,011.78 : 111,778.35 = 47,000.55 : x
  2. Step 2: Convert to fraction form
    81,011.78/111,778.35 = 47,000.55/x
  3. Step 3: Cross multiply
    81,011.78x = 111,778.35 × 47,000.55
  4. Step 4: Simplify right side
    81,011.78x = 5,253,644,171.01
  5. Step 5: Solve for x
    x = 5,253,644,171.01/81,011.78
  6. Step 6: Final answer
    x = 64,850.37

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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.