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Finding the Fourth Proportional to 121,712.93, 167,971.72 and 67,998.24

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Solution

The fourth proportional to 121,712.93, 167,971.72 and 67,998.24 is: 93,841.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,712.93 : 167,971.72 = 67,998.24 : x
  2. Step 2: Convert to fraction form
    121,712.93/167,971.72 = 67,998.24/x
  3. Step 3: Cross multiply
    121,712.93x = 167,971.72 × 67,998.24
  4. Step 4: Simplify right side
    121,712.93x = 11,421,780,659.91
  5. Step 5: Solve for x
    x = 11,421,780,659.91/121,712.93
  6. Step 6: Final answer
    x = 93,841.97

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1.5x scale

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.