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Finding the Fourth Proportional to 136,680.70, 188,339.43 and 100,813.90

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Solution

The fourth proportional to 136,680.70, 188,339.43 and 100,813.90 is: 138,916.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,680.70 : 188,339.43 = 100,813.90 : x
  2. Step 2: Convert to fraction form
    136,680.70/188,339.43 = 100,813.90/x
  3. Step 3: Cross multiply
    136,680.70x = 188,339.43 × 100,813.90
  4. Step 4: Simplify right side
    136,680.70x = 18,987,232,462.08
  5. Step 5: Solve for x
    x = 18,987,232,462.08/136,680.70
  6. Step 6: Final answer
    x = 138,916.70

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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.