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Finding the Fourth Proportional to 80,102.95, 120,117.97 and 42,653.41

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Solution

The fourth proportional to 80,102.95, 120,117.97 and 42,653.41 is: 63,960.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,102.95 : 120,117.97 = 42,653.41 : x
  2. Step 2: Convert to fraction form
    80,102.95/120,117.97 = 42,653.41/x
  3. Step 3: Cross multiply
    80,102.95x = 120,117.97 × 42,653.41
  4. Step 4: Simplify right side
    80,102.95x = 5,123,441,022.78
  5. Step 5: Solve for x
    x = 5,123,441,022.78/80,102.95
  6. Step 6: Final answer
    x = 63,960.70

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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.