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Finding the Fourth Proportional to 84,650.40, 126,716.40 and 61,322.40

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Solution

The fourth proportional to 84,650.40, 126,716.40 and 61,322.40 is: 91,795.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,650.40 : 126,716.40 = 61,322.40 : x
  2. Step 2: Convert to fraction form
    84,650.40/126,716.40 = 61,322.40/x
  3. Step 3: Cross multiply
    84,650.40x = 126,716.40 × 61,322.40
  4. Step 4: Simplify right side
    84,650.40x = 7,770,553,767.36
  5. Step 5: Solve for x
    x = 7,770,553,767.36/84,650.40
  6. Step 6: Final answer
    x = 91,795.83

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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.