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Finding the Fourth Proportional to 78,765.29, 118,147.94 and 19,600.95

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Solution

The fourth proportional to 78,765.29, 118,147.94 and 19,600.95 is: 29,401.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,765.29 : 118,147.94 = 19,600.95 : x
  2. Step 2: Convert to fraction form
    78,765.29/118,147.94 = 19,600.95/x
  3. Step 3: Cross multiply
    78,765.29x = 118,147.94 × 19,600.95
  4. Step 4: Simplify right side
    78,765.29x = 2,315,811,839.79
  5. Step 5: Solve for x
    x = 2,315,811,839.79/78,765.29
  6. Step 6: Final answer
    x = 29,401.43

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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.