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Finding the Fourth Proportional to 189,656.65, 261,703.86 and 104,768.65

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Solution

The fourth proportional to 189,656.65, 261,703.86 and 104,768.65 is: 144,568.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,656.65 : 261,703.86 = 104,768.65 : x
  2. Step 2: Convert to fraction form
    189,656.65/261,703.86 = 104,768.65/x
  3. Step 3: Cross multiply
    189,656.65x = 261,703.86 × 104,768.65
  4. Step 4: Simplify right side
    189,656.65x = 27,418,359,195.81
  5. Step 5: Solve for x
    x = 27,418,359,195.81/189,656.65
  6. Step 6: Final answer
    x = 144,568.41

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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.