Home / 80,828.61-121,243.16-28,238.10

Finding the Fourth Proportional to 80,828.61, 121,243.16 and 28,238.10

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Solution

The fourth proportional to 80,828.61, 121,243.16 and 28,238.10 is: 42,357.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,828.61 : 121,243.16 = 28,238.10 : x
  2. Step 2: Convert to fraction form
    80,828.61/121,243.16 = 28,238.10/x
  3. Step 3: Cross multiply
    80,828.61x = 121,243.16 × 28,238.10
  4. Step 4: Simplify right side
    80,828.61x = 3,423,676,335.21
  5. Step 5: Solve for x
    x = 3,423,676,335.21/80,828.61
  6. Step 6: Final answer
    x = 42,357.23

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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.