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Finding the Fourth Proportional to 121,655.66, 167,872.80 and 67,939.51

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Solution

The fourth proportional to 121,655.66, 167,872.80 and 67,939.51 is: 93,749.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,655.66 : 167,872.80 = 67,939.51 : x
  2. Step 2: Convert to fraction form
    121,655.66/167,872.80 = 67,939.51/x
  3. Step 3: Cross multiply
    121,655.66x = 167,872.80 × 67,939.51
  4. Step 4: Simplify right side
    121,655.66x = 11,405,195,924.18
  5. Step 5: Solve for x
    x = 11,405,195,924.18/121,655.66
  6. Step 6: Final answer
    x = 93,749.82

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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.