Home / 80,831.12-121,246.90-28,240.60

Finding the Fourth Proportional to 80,831.12, 121,246.90 and 28,240.60

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Solution

The fourth proportional to 80,831.12, 121,246.90 and 28,240.60 is: 42,360.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,831.12 : 121,246.90 = 28,240.60 : x
  2. Step 2: Convert to fraction form
    80,831.12/121,246.90 = 28,240.60/x
  3. Step 3: Cross multiply
    80,831.12x = 121,246.90 × 28,240.60
  4. Step 4: Simplify right side
    80,831.12x = 3,424,085,204.14
  5. Step 5: Solve for x
    x = 3,424,085,204.14/80,831.12
  6. Step 6: Final answer
    x = 42,360.98

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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.