Home / 84,831.28-127,245.60-20,790.05

Finding the Fourth Proportional to 84,831.28, 127,245.60 and 20,790.05

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Solution

The fourth proportional to 84,831.28, 127,245.60 and 20,790.05 is: 31,184.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,831.28 : 127,245.60 = 20,790.05 : x
  2. Step 2: Convert to fraction form
    84,831.28/127,245.60 = 20,790.05/x
  3. Step 3: Cross multiply
    84,831.28x = 127,245.60 × 20,790.05
  4. Step 4: Simplify right side
    84,831.28x = 2,645,441,750.05
  5. Step 5: Solve for x
    x = 2,645,441,750.05/84,831.28
  6. Step 6: Final answer
    x = 31,184.74

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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.