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Finding the Fourth Proportional to 189,189, 261,082.62 and 104,309.10

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Solution

The fourth proportional to 189,189, 261,082.62 and 104,309.10 is: 143,947.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,189 : 261,082.62 = 104,309.10 : x
  2. Step 2: Convert to fraction form
    189,189/261,082.62 = 104,309.10/x
  3. Step 3: Cross multiply
    189,189x = 261,082.62 × 104,309.10
  4. Step 4: Simplify right side
    189,189x = 27,233,293,117.84
  5. Step 5: Solve for x
    x = 27,233,293,117.84/189,189
  6. Step 6: Final answer
    x = 143,947.55

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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.