Home / 81,086.40-111,897.42-45,279.78

Finding the Fourth Proportional to 81,086.40, 111,897.42 and 45,279.78

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Solution

The fourth proportional to 81,086.40, 111,897.42 and 45,279.78 is: 62,485.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,086.40 : 111,897.42 = 45,279.78 : x
  2. Step 2: Convert to fraction form
    81,086.40/111,897.42 = 45,279.78/x
  3. Step 3: Cross multiply
    81,086.40x = 111,897.42 × 45,279.78
  4. Step 4: Simplify right side
    81,086.40x = 5,066,690,560.17
  5. Step 5: Solve for x
    x = 5,066,690,560.17/81,086.40
  6. Step 6: Final answer
    x = 62,485.08

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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.