Home / 56,780.66-85,145.04-21,215.90

Finding the Fourth Proportional to 56,780.66, 85,145.04 and 21,215.90

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Solution

The fourth proportional to 56,780.66, 85,145.04 and 21,215.90 is: 31,814.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,780.66 : 85,145.04 = 21,215.90 : x
  2. Step 2: Convert to fraction form
    56,780.66/85,145.04 = 21,215.90/x
  3. Step 3: Cross multiply
    56,780.66x = 85,145.04 × 21,215.90
  4. Step 4: Simplify right side
    56,780.66x = 1,806,428,687.20
  5. Step 5: Solve for x
    x = 1,806,428,687.20/56,780.66
  6. Step 6: Final answer
    x = 31,814.15

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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.