Home / 80,729.51-121,094.88-28,139.05

Finding the Fourth Proportional to 80,729.51, 121,094.88 and 28,139.05

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Solution

The fourth proportional to 80,729.51, 121,094.88 and 28,139.05 is: 42,208.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,729.51 : 121,094.88 = 28,139.05 : x
  2. Step 2: Convert to fraction form
    80,729.51/121,094.88 = 28,139.05/x
  3. Step 3: Cross multiply
    80,729.51x = 121,094.88 × 28,139.05
  4. Step 4: Simplify right side
    80,729.51x = 3,407,494,247.75
  5. Step 5: Solve for x
    x = 3,407,494,247.75/80,729.51
  6. Step 6: Final answer
    x = 42,208.78

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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.