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Finding the Fourth Proportional to 189,630.70, 261,687.65 and 103,588.65

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Solution

The fourth proportional to 189,630.70, 261,687.65 and 103,588.65 is: 142,950.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,630.70 : 261,687.65 = 103,588.65 : x
  2. Step 2: Convert to fraction form
    189,630.70/261,687.65 = 103,588.65/x
  3. Step 3: Cross multiply
    189,630.70x = 261,687.65 × 103,588.65
  4. Step 4: Simplify right side
    189,630.70x = 27,107,869,867.23
  5. Step 5: Solve for x
    x = 27,107,869,867.23/189,630.70
  6. Step 6: Final answer
    x = 142,950.85

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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.