Home / 138,787.13-191,556.61-87,867.74

Finding the Fourth Proportional to 138,787.13, 191,556.61 and 87,867.74

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Solution

The fourth proportional to 138,787.13, 191,556.61 and 87,867.74 is: 121,276.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,787.13 : 191,556.61 = 87,867.74 : x
  2. Step 2: Convert to fraction form
    138,787.13/191,556.61 = 87,867.74/x
  3. Step 3: Cross multiply
    138,787.13x = 191,556.61 × 87,867.74
  4. Step 4: Simplify right side
    138,787.13x = 16,831,646,661.98
  5. Step 5: Solve for x
    x = 16,831,646,661.98/138,787.13
  6. Step 6: Final answer
    x = 121,276.71

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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.