Home / 138,952.08-191,732.09-80,821.70

Finding the Fourth Proportional to 138,952.08, 191,732.09 and 80,821.70

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Solution

The fourth proportional to 138,952.08, 191,732.09 and 80,821.70 is: 111,521.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,952.08 : 191,732.09 = 80,821.70 : x
  2. Step 2: Convert to fraction form
    138,952.08/191,732.09 = 80,821.70/x
  3. Step 3: Cross multiply
    138,952.08x = 191,732.09 × 80,821.70
  4. Step 4: Simplify right side
    138,952.08x = 15,496,112,095.58
  5. Step 5: Solve for x
    x = 15,496,112,095.58/138,952.08
  6. Step 6: Final answer
    x = 111,521.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.