Home / 138,819.42-191,637.39-87,856.85

Finding the Fourth Proportional to 138,819.42, 191,637.39 and 87,856.85

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Solution

The fourth proportional to 138,819.42, 191,637.39 and 87,856.85 is: 121,284.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,819.42 : 191,637.39 = 87,856.85 : x
  2. Step 2: Convert to fraction form
    138,819.42/191,637.39 = 87,856.85/x
  3. Step 3: Cross multiply
    138,819.42x = 191,637.39 × 87,856.85
  4. Step 4: Simplify right side
    138,819.42x = 16,836,658,236.18
  5. Step 5: Solve for x
    x = 16,836,658,236.18/138,819.42
  6. Step 6: Final answer
    x = 121,284.60

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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.