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Finding the Fourth Proportional to 136,704.09, 188,656.15 and 79,339.08

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Solution

The fourth proportional to 136,704.09, 188,656.15 and 79,339.08 is: 109,490.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,704.09 : 188,656.15 = 79,339.08 : x
  2. Step 2: Convert to fraction form
    136,704.09/188,656.15 = 79,339.08/x
  3. Step 3: Cross multiply
    136,704.09x = 188,656.15 × 79,339.08
  4. Step 4: Simplify right side
    136,704.09x = 14,967,805,377.34
  5. Step 5: Solve for x
    x = 14,967,805,377.34/136,704.09
  6. Step 6: Final answer
    x = 109,490.55

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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.