Home / 138,924.85-191,645.81-87,851.51

Finding the Fourth Proportional to 138,924.85, 191,645.81 and 87,851.51

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Solution

The fourth proportional to 138,924.85, 191,645.81 and 87,851.51 is: 121,190.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,924.85 : 191,645.81 = 87,851.51 : x
  2. Step 2: Convert to fraction form
    138,924.85/191,645.81 = 87,851.51/x
  3. Step 3: Cross multiply
    138,924.85x = 191,645.81 × 87,851.51
  4. Step 4: Simplify right side
    138,924.85x = 16,836,374,492.42
  5. Step 5: Solve for x
    x = 16,836,374,492.42/138,924.85
  6. Step 6: Final answer
    x = 121,190.52

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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.