Home / 80,911.20-121,366.80-52,917.60

Finding the Fourth Proportional to 80,911.20, 121,366.80 and 52,917.60

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Solution

The fourth proportional to 80,911.20, 121,366.80 and 52,917.60 is: 79,376.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,911.20 : 121,366.80 = 52,917.60 : x
  2. Step 2: Convert to fraction form
    80,911.20/121,366.80 = 52,917.60/x
  3. Step 3: Cross multiply
    80,911.20x = 121,366.80 × 52,917.60
  4. Step 4: Simplify right side
    80,911.20x = 6,422,439,775.68
  5. Step 5: Solve for x
    x = 6,422,439,775.68/80,911.20
  6. Step 6: Final answer
    x = 79,376.40

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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.