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Finding the Fourth Proportional to 121,677.84, 167,915.52 and 67,962.78

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Solution

The fourth proportional to 121,677.84, 167,915.52 and 67,962.78 is: 93,788.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,677.84 : 167,915.52 = 67,962.78 : x
  2. Step 2: Convert to fraction form
    121,677.84/167,915.52 = 67,962.78/x
  3. Step 3: Cross multiply
    121,677.84x = 167,915.52 × 67,962.78
  4. Step 4: Simplify right side
    121,677.84x = 11,412,005,544.35
  5. Step 5: Solve for x
    x = 11,412,005,544.35/121,677.84
  6. Step 6: Final answer
    x = 93,788.69

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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.