Home / 82,972.68-124,458.76-20,643.18

Finding the Fourth Proportional to 82,972.68, 124,458.76 and 20,643.18

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Solution

The fourth proportional to 82,972.68, 124,458.76 and 20,643.18 is: 30,964.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,972.68 : 124,458.76 = 20,643.18 : x
  2. Step 2: Convert to fraction form
    82,972.68/124,458.76 = 20,643.18/x
  3. Step 3: Cross multiply
    82,972.68x = 124,458.76 × 20,643.18
  4. Step 4: Simplify right side
    82,972.68x = 2,569,224,585.26
  5. Step 5: Solve for x
    x = 2,569,224,585.26/82,972.68
  6. Step 6: Final answer
    x = 30,964.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.