Home / 189,144.63-261,015.71-103,102.88

Finding the Fourth Proportional to 189,144.63, 261,015.71 and 103,102.88

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Solution

The fourth proportional to 189,144.63, 261,015.71 and 103,102.88 is: 142,279.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,144.63 : 261,015.71 = 103,102.88 : x
  2. Step 2: Convert to fraction form
    189,144.63/261,015.71 = 103,102.88/x
  3. Step 3: Cross multiply
    189,144.63x = 261,015.71 × 103,102.88
  4. Step 4: Simplify right side
    189,144.63x = 26,911,469,605.65
  5. Step 5: Solve for x
    x = 26,911,469,605.65/189,144.63
  6. Step 6: Final answer
    x = 142,279.85

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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.