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Finding the Fourth Proportional to 126,390.98, 189,621.11 and 55,300.73

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Solution

The fourth proportional to 126,390.98, 189,621.11 and 55,300.73 is: 82,966.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,390.98 : 189,621.11 = 55,300.73 : x
  2. Step 2: Convert to fraction form
    126,390.98/189,621.11 = 55,300.73/x
  3. Step 3: Cross multiply
    126,390.98x = 189,621.11 × 55,300.73
  4. Step 4: Simplify right side
    126,390.98x = 10,486,185,529.91
  5. Step 5: Solve for x
    x = 10,486,185,529.91/126,390.98
  6. Step 6: Final answer
    x = 82,966.25

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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.