Home / 81,115.12-111,927.79-45,300.56

Finding the Fourth Proportional to 81,115.12, 111,927.79 and 45,300.56

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Solution

The fourth proportional to 81,115.12, 111,927.79 and 45,300.56 is: 62,508.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,115.12 : 111,927.79 = 45,300.56 : x
  2. Step 2: Convert to fraction form
    81,115.12/111,927.79 = 45,300.56/x
  3. Step 3: Cross multiply
    81,115.12x = 111,927.79 × 45,300.56
  4. Step 4: Simplify right side
    81,115.12x = 5,070,391,566.56
  5. Step 5: Solve for x
    x = 5,070,391,566.56/81,115.12
  6. Step 6: Final answer
    x = 62,508.59

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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.