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Finding the Fourth Proportional to 207,166.45, 310,913.70 and 80,867.20

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Solution

The fourth proportional to 207,166.45, 310,913.70 and 80,867.20 is: 121,364.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,166.45 : 310,913.70 = 80,867.20 : x
  2. Step 2: Convert to fraction form
    207,166.45/310,913.70 = 80,867.20/x
  3. Step 3: Cross multiply
    207,166.45x = 310,913.70 × 80,867.20
  4. Step 4: Simplify right side
    207,166.45x = 25,142,720,360.64
  5. Step 5: Solve for x
    x = 25,142,720,360.64/207,166.45
  6. Step 6: Final answer
    x = 121,364.83

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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.