Home / 100,156.86-138,204.27-79,790.85

Finding the Fourth Proportional to 100,156.86, 138,204.27 and 79,790.85

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Solution

The fourth proportional to 100,156.86, 138,204.27 and 79,790.85 is: 110,101.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,156.86 : 138,204.27 = 79,790.85 : x
  2. Step 2: Convert to fraction form
    100,156.86/138,204.27 = 79,790.85/x
  3. Step 3: Cross multiply
    100,156.86x = 138,204.27 × 79,790.85
  4. Step 4: Simplify right side
    100,156.86x = 11,027,436,176.93
  5. Step 5: Solve for x
    x = 11,027,436,176.93/100,156.86
  6. Step 6: Final answer
    x = 110,101.66

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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.