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Finding the Fourth Proportional to 121,662, 167,891.81 and 67,947.80

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Solution

The fourth proportional to 121,662, 167,891.81 and 67,947.80 is: 93,766.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,662 : 167,891.81 = 67,947.80 : x
  2. Step 2: Convert to fraction form
    121,662/167,891.81 = 67,947.80/x
  3. Step 3: Cross multiply
    121,662x = 167,891.81 × 67,947.80
  4. Step 4: Simplify right side
    121,662x = 11,407,877,948.32
  5. Step 5: Solve for x
    x = 11,407,877,948.32/121,662
  6. Step 6: Final answer
    x = 93,766.98

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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.