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Finding the Fourth Proportional to 189,197.80, 261,081.06 and 104,315.56

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Solution

The fourth proportional to 189,197.80, 261,081.06 and 104,315.56 is: 143,948.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,197.80 : 261,081.06 = 104,315.56 : x
  2. Step 2: Convert to fraction form
    189,197.80/261,081.06 = 104,315.56/x
  3. Step 3: Cross multiply
    189,197.80x = 261,081.06 × 104,315.56
  4. Step 4: Simplify right side
    189,197.80x = 27,234,816,979.29
  5. Step 5: Solve for x
    x = 27,234,816,979.29/189,197.80
  6. Step 6: Final answer
    x = 143,948.91

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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.