Home / 81,831.20-122,746.80-75,999.20

Finding the Fourth Proportional to 81,831.20, 122,746.80 and 75,999.20

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Solution

The fourth proportional to 81,831.20, 122,746.80 and 75,999.20 is: 113,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,831.20 : 122,746.80 = 75,999.20 : x
  2. Step 2: Convert to fraction form
    81,831.20/122,746.80 = 75,999.20/x
  3. Step 3: Cross multiply
    81,831.20x = 122,746.80 × 75,999.20
  4. Step 4: Simplify right side
    81,831.20x = 9,328,658,602.56
  5. Step 5: Solve for x
    x = 9,328,658,602.56/81,831.20
  6. Step 6: Final answer
    x = 113,998.80

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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.