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Finding the Fourth Proportional to 121,557.68, 167,742.54 and 67,838.48

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Solution

The fourth proportional to 121,557.68, 167,742.54 and 67,838.48 is: 93,613.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,557.68 : 167,742.54 = 67,838.48 : x
  2. Step 2: Convert to fraction form
    121,557.68/167,742.54 = 67,838.48/x
  3. Step 3: Cross multiply
    121,557.68x = 167,742.54 × 67,838.48
  4. Step 4: Simplify right side
    121,557.68x = 11,379,398,944.94
  5. Step 5: Solve for x
    x = 11,379,398,944.94/121,557.68
  6. Step 6: Final answer
    x = 93,613.16

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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.