Home / 52,721.28-79,081.92-21,145.68

Finding the Fourth Proportional to 52,721.28, 79,081.92 and 21,145.68

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Solution

The fourth proportional to 52,721.28, 79,081.92 and 21,145.68 is: 31,718.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,721.28 : 79,081.92 = 21,145.68 : x
  2. Step 2: Convert to fraction form
    52,721.28/79,081.92 = 21,145.68/x
  3. Step 3: Cross multiply
    52,721.28x = 79,081.92 × 21,145.68
  4. Step 4: Simplify right side
    52,721.28x = 1,672,240,974.11
  5. Step 5: Solve for x
    x = 1,672,240,974.11/52,721.28
  6. Step 6: Final answer
    x = 31,718.52

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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.