Home / 80,943.25-121,415.10-28,340.43

Finding the Fourth Proportional to 80,943.25, 121,415.10 and 28,340.43

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Solution

The fourth proportional to 80,943.25, 121,415.10 and 28,340.43 is: 42,510.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,943.25 : 121,415.10 = 28,340.43 : x
  2. Step 2: Convert to fraction form
    80,943.25/121,415.10 = 28,340.43/x
  3. Step 3: Cross multiply
    80,943.25x = 121,415.10 × 28,340.43
  4. Step 4: Simplify right side
    80,943.25x = 3,440,956,423.28
  5. Step 5: Solve for x
    x = 3,440,956,423.28/80,943.25
  6. Step 6: Final answer
    x = 42,510.73

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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.