Home / 81,132.68-111,938.51-47,134.55

Finding the Fourth Proportional to 81,132.68, 111,938.51 and 47,134.55

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Solution

The fourth proportional to 81,132.68, 111,938.51 and 47,134.55 is: 65,031.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,132.68 : 111,938.51 = 47,134.55 : x
  2. Step 2: Convert to fraction form
    81,132.68/111,938.51 = 47,134.55/x
  3. Step 3: Cross multiply
    81,132.68x = 111,938.51 × 47,134.55
  4. Step 4: Simplify right side
    81,132.68x = 5,276,171,694.20
  5. Step 5: Solve for x
    x = 5,276,171,694.20/81,132.68
  6. Step 6: Final answer
    x = 65,031.40

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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.