Home / 81,328.38-121,980-22,168.83

Finding the Fourth Proportional to 81,328.38, 121,980 and 22,168.83

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Solution

The fourth proportional to 81,328.38, 121,980 and 22,168.83 is: 33,249.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,328.38 : 121,980 = 22,168.83 : x
  2. Step 2: Convert to fraction form
    81,328.38/121,980 = 22,168.83/x
  3. Step 3: Cross multiply
    81,328.38x = 121,980 × 22,168.83
  4. Step 4: Simplify right side
    81,328.38x = 2,704,153,883.40
  5. Step 5: Solve for x
    x = 2,704,153,883.40/81,328.38
  6. Step 6: Final answer
    x = 33,249.82

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1.5x scale

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.