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Finding the Fourth Proportional to 136,408.86, 188,330.39 and 100,536.39

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Solution

The fourth proportional to 136,408.86, 188,330.39 and 100,536.39 is: 138,803.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,408.86 : 188,330.39 = 100,536.39 : x
  2. Step 2: Convert to fraction form
    136,408.86/188,330.39 = 100,536.39/x
  3. Step 3: Cross multiply
    136,408.86x = 188,330.39 × 100,536.39
  4. Step 4: Simplify right side
    136,408.86x = 18,934,057,537.89
  5. Step 5: Solve for x
    x = 18,934,057,537.89/136,408.86
  6. Step 6: Final answer
    x = 138,803.72

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1.5x scale

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.