Home / 80,911.92-121,393.08-72,539.22

Finding the Fourth Proportional to 80,911.92, 121,393.08 and 72,539.22

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Solution

The fourth proportional to 80,911.92, 121,393.08 and 72,539.22 is: 108,831.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,911.92 : 121,393.08 = 72,539.22 : x
  2. Step 2: Convert to fraction form
    80,911.92/121,393.08 = 72,539.22/x
  3. Step 3: Cross multiply
    80,911.92x = 121,393.08 × 72,539.22
  4. Step 4: Simplify right side
    80,911.92x = 8,805,759,336.60
  5. Step 5: Solve for x
    x = 8,805,759,336.60/80,911.92
  6. Step 6: Final answer
    x = 108,831.42

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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.