Home / 138,562.25-191,280.28-81,193.61

Finding the Fourth Proportional to 138,562.25, 191,280.28 and 81,193.61

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Solution

The fourth proportional to 138,562.25, 191,280.28 and 81,193.61 is: 112,084.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,562.25 : 191,280.28 = 81,193.61 : x
  2. Step 2: Convert to fraction form
    138,562.25/191,280.28 = 81,193.61/x
  3. Step 3: Cross multiply
    138,562.25x = 191,280.28 × 81,193.61
  4. Step 4: Simplify right side
    138,562.25x = 15,530,736,730.23
  5. Step 5: Solve for x
    x = 15,530,736,730.23/138,562.25
  6. Step 6: Final answer
    x = 112,084.90

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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.