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Finding the Fourth Proportional to 207,482.60, 311,230.30 and 81,117.80

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Solution

The fourth proportional to 207,482.60, 311,230.30 and 81,117.80 is: 121,679.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,482.60 : 311,230.30 = 81,117.80 : x
  2. Step 2: Convert to fraction form
    207,482.60/311,230.30 = 81,117.80/x
  3. Step 3: Cross multiply
    207,482.60x = 311,230.30 × 81,117.80
  4. Step 4: Simplify right side
    207,482.60x = 25,246,317,229.34
  5. Step 5: Solve for x
    x = 25,246,317,229.34/207,482.60
  6. Step 6: Final answer
    x = 121,679.20

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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.