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Finding the Fourth Proportional to 131,605.70, 197,408.55 and 80,867.30

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Solution

The fourth proportional to 131,605.70, 197,408.55 and 80,867.30 is: 121,300.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,605.70 : 197,408.55 = 80,867.30 : x
  2. Step 2: Convert to fraction form
    131,605.70/197,408.55 = 80,867.30/x
  3. Step 3: Cross multiply
    131,605.70x = 197,408.55 × 80,867.30
  4. Step 4: Simplify right side
    131,605.70x = 15,963,896,435.42
  5. Step 5: Solve for x
    x = 15,963,896,435.42/131,605.70
  6. Step 6: Final answer
    x = 121,300.95

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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.