Home / 126,252.72-189,251.10-81,907.74

Finding the Fourth Proportional to 126,252.72, 189,251.10 and 81,907.74

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Solution

The fourth proportional to 126,252.72, 189,251.10 and 81,907.74 is: 122,778.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,252.72 : 189,251.10 = 81,907.74 : x
  2. Step 2: Convert to fraction form
    126,252.72/189,251.10 = 81,907.74/x
  3. Step 3: Cross multiply
    126,252.72x = 189,251.10 × 81,907.74
  4. Step 4: Simplify right side
    126,252.72x = 15,501,129,893.51
  5. Step 5: Solve for x
    x = 15,501,129,893.51/126,252.72
  6. Step 6: Final answer
    x = 122,778.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.