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Finding the Fourth Proportional to 157,231.80, 235,329.30 and 121,980.60

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Solution

The fourth proportional to 157,231.80, 235,329.30 and 121,980.60 is: 182,568.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,231.80 : 235,329.30 = 121,980.60 : x
  2. Step 2: Convert to fraction form
    157,231.80/235,329.30 = 121,980.60/x
  3. Step 3: Cross multiply
    157,231.80x = 235,329.30 × 121,980.60
  4. Step 4: Simplify right side
    157,231.80x = 28,705,609,211.58
  5. Step 5: Solve for x
    x = 28,705,609,211.58/157,231.80
  6. Step 6: Final answer
    x = 182,568.72

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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.