Home / 121,818.15-168,112.53-68,103.30

Finding the Fourth Proportional to 121,818.15, 168,112.53 and 68,103.30

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Solution

The fourth proportional to 121,818.15, 168,112.53 and 68,103.30 is: 93,984.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,818.15 : 168,112.53 = 68,103.30 : x
  2. Step 2: Convert to fraction form
    121,818.15/168,112.53 = 68,103.30/x
  3. Step 3: Cross multiply
    121,818.15x = 168,112.53 × 68,103.30
  4. Step 4: Simplify right side
    121,818.15x = 11,449,018,064.35
  5. Step 5: Solve for x
    x = 11,449,018,064.35/121,818.15
  6. Step 6: Final answer
    x = 93,984.50

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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.