Home / 280,827.20-421,240.80-81,154.10

Finding the Fourth Proportional to 280,827.20, 421,240.80 and 81,154.10

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Solution

The fourth proportional to 280,827.20, 421,240.80 and 81,154.10 is: 121,731.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,827.20 : 421,240.80 = 81,154.10 : x
  2. Step 2: Convert to fraction form
    280,827.20/421,240.80 = 81,154.10/x
  3. Step 3: Cross multiply
    280,827.20x = 421,240.80 × 81,154.10
  4. Step 4: Simplify right side
    280,827.20x = 34,185,418,007.28
  5. Step 5: Solve for x
    x = 34,185,418,007.28/280,827.20
  6. Step 6: Final answer
    x = 121,731.15

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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.