Home / 81,330.15-121,831.20-54,758.10

Finding the Fourth Proportional to 81,330.15, 121,831.20 and 54,758.10

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Solution

The fourth proportional to 81,330.15, 121,831.20 and 54,758.10 is: 82,026.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,330.15 : 121,831.20 = 54,758.10 : x
  2. Step 2: Convert to fraction form
    81,330.15/121,831.20 = 54,758.10/x
  3. Step 3: Cross multiply
    81,330.15x = 121,831.20 × 54,758.10
  4. Step 4: Simplify right side
    81,330.15x = 6,671,245,032.72
  5. Step 5: Solve for x
    x = 6,671,245,032.72/81,330.15
  6. Step 6: Final answer
    x = 82,026.71

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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.