Home / 121,885.83-168,204.20-68,173.11

Finding the Fourth Proportional to 121,885.83, 168,204.20 and 68,173.11

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Solution

The fourth proportional to 121,885.83, 168,204.20 and 68,173.11 is: 94,079.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,885.83 : 168,204.20 = 68,173.11 : x
  2. Step 2: Convert to fraction form
    121,885.83/168,204.20 = 68,173.11/x
  3. Step 3: Cross multiply
    121,885.83x = 168,204.20 × 68,173.11
  4. Step 4: Simplify right side
    121,885.83x = 11,467,003,088.20
  5. Step 5: Solve for x
    x = 11,467,003,088.20/121,885.83
  6. Step 6: Final answer
    x = 94,079.87

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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.