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Finding the Fourth Proportional to 136,710.39, 188,630.10 and 79,316.43

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Solution

The fourth proportional to 136,710.39, 188,630.10 and 79,316.43 is: 109,439.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,710.39 : 188,630.10 = 79,316.43 : x
  2. Step 2: Convert to fraction form
    136,710.39/188,630.10 = 79,316.43/x
  3. Step 3: Cross multiply
    136,710.39x = 188,630.10 × 79,316.43
  4. Step 4: Simplify right side
    136,710.39x = 14,961,466,122.54
  5. Step 5: Solve for x
    x = 14,961,466,122.54/136,710.39
  6. Step 6: Final answer
    x = 109,439.13

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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.