Home / 80,811.12-121,156.20-55,779.69

Finding the Fourth Proportional to 80,811.12, 121,156.20 and 55,779.69

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Solution

The fourth proportional to 80,811.12, 121,156.20 and 55,779.69 is: 83,627.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,811.12 : 121,156.20 = 55,779.69 : x
  2. Step 2: Convert to fraction form
    80,811.12/121,156.20 = 55,779.69/x
  3. Step 3: Cross multiply
    80,811.12x = 121,156.20 × 55,779.69
  4. Step 4: Simplify right side
    80,811.12x = 6,758,055,277.58
  5. Step 5: Solve for x
    x = 6,758,055,277.58/80,811.12
  6. Step 6: Final answer
    x = 83,627.79

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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.