Home / 81,125.31-111,987.45-49,304.46

Finding the Fourth Proportional to 81,125.31, 111,987.45 and 49,304.46

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Solution

The fourth proportional to 81,125.31, 111,987.45 and 49,304.46 is: 68,061.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,125.31 : 111,987.45 = 49,304.46 : x
  2. Step 2: Convert to fraction form
    81,125.31/111,987.45 = 49,304.46/x
  3. Step 3: Cross multiply
    81,125.31x = 111,987.45 × 49,304.46
  4. Step 4: Simplify right side
    81,125.31x = 5,521,480,749.03
  5. Step 5: Solve for x
    x = 5,521,480,749.03/81,125.31
  6. Step 6: Final answer
    x = 68,061.14

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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.