Home / 81,249.70-112,152.78-55,840.18

Finding the Fourth Proportional to 81,249.70, 112,152.78 and 55,840.18

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Solution

The fourth proportional to 81,249.70, 112,152.78 and 55,840.18 is: 77,078.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,249.70 : 112,152.78 = 55,840.18 : x
  2. Step 2: Convert to fraction form
    81,249.70/112,152.78 = 55,840.18/x
  3. Step 3: Cross multiply
    81,249.70x = 112,152.78 × 55,840.18
  4. Step 4: Simplify right side
    81,249.70x = 6,262,631,422.70
  5. Step 5: Solve for x
    x = 6,262,631,422.70/81,249.70
  6. Step 6: Final answer
    x = 77,078.83

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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.