Home / 80,750.32-121,126.02-28,159.78

Finding the Fourth Proportional to 80,750.32, 121,126.02 and 28,159.78

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Solution

The fourth proportional to 80,750.32, 121,126.02 and 28,159.78 is: 42,239.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,750.32 : 121,126.02 = 28,159.78 : x
  2. Step 2: Convert to fraction form
    80,750.32/121,126.02 = 28,159.78/x
  3. Step 3: Cross multiply
    80,750.32x = 121,126.02 × 28,159.78
  4. Step 4: Simplify right side
    80,750.32x = 3,410,882,075.48
  5. Step 5: Solve for x
    x = 3,410,882,075.48/80,750.32
  6. Step 6: Final answer
    x = 42,239.86

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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.