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Finding the Fourth Proportional to 189,561.80, 261,595.51 and 104,678.87

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Solution

The fourth proportional to 189,561.80, 261,595.51 and 104,678.87 is: 144,456.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,561.80 : 261,595.51 = 104,678.87 : x
  2. Step 2: Convert to fraction form
    189,561.80/261,595.51 = 104,678.87/x
  3. Step 3: Cross multiply
    189,561.80x = 261,595.51 × 104,678.87
  4. Step 4: Simplify right side
    189,561.80x = 27,383,520,814.20
  5. Step 5: Solve for x
    x = 27,383,520,814.20/189,561.80
  6. Step 6: Final answer
    x = 144,456.96

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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.