Home / 189,431.42-261,415.91-103,391.19

Finding the Fourth Proportional to 189,431.42, 261,415.91 and 103,391.19

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Solution

The fourth proportional to 189,431.42, 261,415.91 and 103,391.19 is: 142,680.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,431.42 : 261,415.91 = 103,391.19 : x
  2. Step 2: Convert to fraction form
    189,431.42/261,415.91 = 103,391.19/x
  3. Step 3: Cross multiply
    189,431.42x = 261,415.91 × 103,391.19
  4. Step 4: Simplify right side
    189,431.42x = 27,028,101,502.88
  5. Step 5: Solve for x
    x = 27,028,101,502.88/189,431.42
  6. Step 6: Final answer
    x = 142,680.14

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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.