Home / 206,330.85-309,503.61-66,071.25

Finding the Fourth Proportional to 206,330.85, 309,503.61 and 66,071.25

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Solution

The fourth proportional to 206,330.85, 309,503.61 and 66,071.25 is: 99,109.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,330.85 : 309,503.61 = 66,071.25 : x
  2. Step 2: Convert to fraction form
    206,330.85/309,503.61 = 66,071.25/x
  3. Step 3: Cross multiply
    206,330.85x = 309,503.61 × 66,071.25
  4. Step 4: Simplify right side
    206,330.85x = 20,449,290,392.21
  5. Step 5: Solve for x
    x = 20,449,290,392.21/206,330.85
  6. Step 6: Final answer
    x = 99,109.22

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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.