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Finding the Fourth Proportional to 78,908.93, 118,363.71 and 19,744.43

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Solution

The fourth proportional to 78,908.93, 118,363.71 and 19,744.43 is: 29,616.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,908.93 : 118,363.71 = 19,744.43 : x
  2. Step 2: Convert to fraction form
    78,908.93/118,363.71 = 19,744.43/x
  3. Step 3: Cross multiply
    78,908.93x = 118,363.71 × 19,744.43
  4. Step 4: Simplify right side
    78,908.93x = 2,337,023,986.64
  5. Step 5: Solve for x
    x = 2,337,023,986.64/78,908.93
  6. Step 6: Final answer
    x = 29,616.72

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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.