Home / 81,921.12-113,085.98-55,079.19

Finding the Fourth Proportional to 81,921.12, 113,085.98 and 55,079.19

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Solution

The fourth proportional to 81,921.12, 113,085.98 and 55,079.19 is: 76,032.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,921.12 : 113,085.98 = 55,079.19 : x
  2. Step 2: Convert to fraction form
    81,921.12/113,085.98 = 55,079.19/x
  3. Step 3: Cross multiply
    81,921.12x = 113,085.98 × 55,079.19
  4. Step 4: Simplify right side
    81,921.12x = 6,228,684,109.91
  5. Step 5: Solve for x
    x = 6,228,684,109.91/81,921.12
  6. Step 6: Final answer
    x = 76,032.71

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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.