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Finding the Fourth Proportional to 121,356, 167,472.08 and 67,644.42

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Solution

The fourth proportional to 121,356, 167,472.08 and 67,644.42 is: 93,349.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,356 : 167,472.08 = 67,644.42 : x
  2. Step 2: Convert to fraction form
    121,356/167,472.08 = 67,644.42/x
  3. Step 3: Cross multiply
    121,356x = 167,472.08 × 67,644.42
  4. Step 4: Simplify right side
    121,356x = 11,328,551,717.79
  5. Step 5: Solve for x
    x = 11,328,551,717.79/121,356
  6. Step 6: Final answer
    x = 93,349.75

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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.