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Finding the Fourth Proportional to 121,319.60, 182,173.80 and 91,770.80

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Solution

The fourth proportional to 121,319.60, 182,173.80 and 91,770.80 is: 137,803.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,319.60 : 182,173.80 = 91,770.80 : x
  2. Step 2: Convert to fraction form
    121,319.60/182,173.80 = 91,770.80/x
  3. Step 3: Cross multiply
    121,319.60x = 182,173.80 × 91,770.80
  4. Step 4: Simplify right side
    121,319.60x = 16,718,235,365.04
  5. Step 5: Solve for x
    x = 16,718,235,365.04/121,319.60
  6. Step 6: Final answer
    x = 137,803.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.