Home / 55,139.20-76,085.76-31,261.12

Finding the Fourth Proportional to 55,139.20, 76,085.76 and 31,261.12

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Solution

The fourth proportional to 55,139.20, 76,085.76 and 31,261.12 is: 43,136.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,139.20 : 76,085.76 = 31,261.12 : x
  2. Step 2: Convert to fraction form
    55,139.20/76,085.76 = 31,261.12/x
  3. Step 3: Cross multiply
    55,139.20x = 76,085.76 × 31,261.12
  4. Step 4: Simplify right side
    55,139.20x = 2,378,526,073.65
  5. Step 5: Solve for x
    x = 2,378,526,073.65/55,139.20
  6. Step 6: Final answer
    x = 43,136.75

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1.5x scale

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.