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Finding the Fourth Proportional to 84,081.84, 126,131.64 and 34,154.48

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Solution

The fourth proportional to 84,081.84, 126,131.64 and 34,154.48 is: 51,235.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,081.84 : 126,131.64 = 34,154.48 : x
  2. Step 2: Convert to fraction form
    84,081.84/126,131.64 = 34,154.48/x
  3. Step 3: Cross multiply
    84,081.84x = 126,131.64 × 34,154.48
  4. Step 4: Simplify right side
    84,081.84x = 4,307,960,575.75
  5. Step 5: Solve for x
    x = 4,307,960,575.75/84,081.84
  6. Step 6: Final answer
    x = 51,235.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.