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Finding the Fourth Proportional to 121,706.84, 167,952.15 and 66,513.98

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Solution

The fourth proportional to 121,706.84, 167,952.15 and 66,513.98 is: 91,787.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,706.84 : 167,952.15 = 66,513.98 : x
  2. Step 2: Convert to fraction form
    121,706.84/167,952.15 = 66,513.98/x
  3. Step 3: Cross multiply
    121,706.84x = 167,952.15 × 66,513.98
  4. Step 4: Simplify right side
    121,706.84x = 11,171,165,106.30
  5. Step 5: Solve for x
    x = 11,171,165,106.30/121,706.84
  6. Step 6: Final answer
    x = 91,787.49

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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.