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Finding the Fourth Proportional to 207,308.31, 310,961.46 and 80,961.39

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Solution

The fourth proportional to 207,308.31, 310,961.46 and 80,961.39 is: 121,441.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,308.31 : 310,961.46 = 80,961.39 : x
  2. Step 2: Convert to fraction form
    207,308.31/310,961.46 = 80,961.39/x
  3. Step 3: Cross multiply
    207,308.31x = 310,961.46 × 80,961.39
  4. Step 4: Simplify right side
    207,308.31x = 25,175,872,038.03
  5. Step 5: Solve for x
    x = 25,175,872,038.03/207,308.31
  6. Step 6: Final answer
    x = 121,441.69

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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.