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Finding the Fourth Proportional to 121,218.64, 167,269.80 and 67,501.60

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Solution

The fourth proportional to 121,218.64, 167,269.80 and 67,501.60 is: 93,145.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,218.64 : 167,269.80 = 67,501.60 : x
  2. Step 2: Convert to fraction form
    121,218.64/167,269.80 = 67,501.60/x
  3. Step 3: Cross multiply
    121,218.64x = 167,269.80 × 67,501.60
  4. Step 4: Simplify right side
    121,218.64x = 11,290,979,131.68
  5. Step 5: Solve for x
    x = 11,290,979,131.68/121,218.64
  6. Step 6: Final answer
    x = 93,145.57

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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.