Home / 82,428.20-113,718.72-53,781.56

Finding the Fourth Proportional to 82,428.20, 113,718.72 and 53,781.56

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Solution

The fourth proportional to 82,428.20, 113,718.72 and 53,781.56 is: 74,197.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,428.20 : 113,718.72 = 53,781.56 : x
  2. Step 2: Convert to fraction form
    82,428.20/113,718.72 = 53,781.56/x
  3. Step 3: Cross multiply
    82,428.20x = 113,718.72 × 53,781.56
  4. Step 4: Simplify right side
    82,428.20x = 6,115,970,162.80
  5. Step 5: Solve for x
    x = 6,115,970,162.80/82,428.20
  6. Step 6: Final answer
    x = 74,197.55

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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.