Home / 51,909.06-77,860.35-20,721.90

Finding the Fourth Proportional to 51,909.06, 77,860.35 and 20,721.90

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Solution

The fourth proportional to 51,909.06, 77,860.35 and 20,721.90 is: 31,081.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,909.06 : 77,860.35 = 20,721.90 : x
  2. Step 2: Convert to fraction form
    51,909.06/77,860.35 = 20,721.90/x
  3. Step 3: Cross multiply
    51,909.06x = 77,860.35 × 20,721.90
  4. Step 4: Simplify right side
    51,909.06x = 1,613,414,386.67
  5. Step 5: Solve for x
    x = 1,613,414,386.67/51,909.06
  6. Step 6: Final answer
    x = 31,081.56

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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.