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Finding the Fourth Proportional to 135,793.78, 187,417.95 and 79,205.17

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Solution

The fourth proportional to 135,793.78, 187,417.95 and 79,205.17 is: 109,316.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,793.78 : 187,417.95 = 79,205.17 : x
  2. Step 2: Convert to fraction form
    135,793.78/187,417.95 = 79,205.17/x
  3. Step 3: Cross multiply
    135,793.78x = 187,417.95 × 79,205.17
  4. Step 4: Simplify right side
    135,793.78x = 14,844,470,590.80
  5. Step 5: Solve for x
    x = 14,844,470,590.80/135,793.78
  6. Step 6: Final answer
    x = 109,316.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.