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Finding the Fourth Proportional to 121,696.40, 167,939.72 and 67,986.80

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Solution

The fourth proportional to 121,696.40, 167,939.72 and 67,986.80 is: 93,821.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,696.40 : 167,939.72 = 67,986.80 : x
  2. Step 2: Convert to fraction form
    121,696.40/167,939.72 = 67,986.80/x
  3. Step 3: Cross multiply
    121,696.40x = 167,939.72 × 67,986.80
  4. Step 4: Simplify right side
    121,696.40x = 11,417,684,155.70
  5. Step 5: Solve for x
    x = 11,417,684,155.70/121,696.40
  6. Step 6: Final answer
    x = 93,821.05

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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.