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Finding the Fourth Proportional to 171,081.21, 236,101.05 and 103,119.78

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Solution

The fourth proportional to 171,081.21, 236,101.05 and 103,119.78 is: 142,310.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,081.21 : 236,101.05 = 103,119.78 : x
  2. Step 2: Convert to fraction form
    171,081.21/236,101.05 = 103,119.78/x
  3. Step 3: Cross multiply
    171,081.21x = 236,101.05 × 103,119.78
  4. Step 4: Simplify right side
    171,081.21x = 24,346,688,333.77
  5. Step 5: Solve for x
    x = 24,346,688,333.77/171,081.21
  6. Step 6: Final answer
    x = 142,310.71

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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.