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Finding the Fourth Proportional to 79,787.14, 119,578.95 and 42,365.14

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Solution

The fourth proportional to 79,787.14, 119,578.95 and 42,365.14 is: 63,493.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,787.14 : 119,578.95 = 42,365.14 : x
  2. Step 2: Convert to fraction form
    79,787.14/119,578.95 = 42,365.14/x
  3. Step 3: Cross multiply
    79,787.14x = 119,578.95 × 42,365.14
  4. Step 4: Simplify right side
    79,787.14x = 5,065,978,658.86
  5. Step 5: Solve for x
    x = 5,065,978,658.86/79,787.14
  6. Step 6: Final answer
    x = 63,493.68

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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.