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Finding the Fourth Proportional to 121,453.75, 167,620.80 and 71,152.75

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Solution

The fourth proportional to 121,453.75, 167,620.80 and 71,152.75 is: 98,199.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,453.75 : 167,620.80 = 71,152.75 : x
  2. Step 2: Convert to fraction form
    121,453.75/167,620.80 = 71,152.75/x
  3. Step 3: Cross multiply
    121,453.75x = 167,620.80 × 71,152.75
  4. Step 4: Simplify right side
    121,453.75x = 11,926,680,877.20
  5. Step 5: Solve for x
    x = 11,926,680,877.20/121,453.75
  6. Step 6: Final answer
    x = 98,199.36

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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.