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Finding the Fourth Proportional to 126,393.84, 189,609.12 and 51,518.52

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Solution

The fourth proportional to 126,393.84, 189,609.12 and 51,518.52 is: 77,285.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,393.84 : 189,609.12 = 51,518.52 : x
  2. Step 2: Convert to fraction form
    126,393.84/189,609.12 = 51,518.52/x
  3. Step 3: Cross multiply
    126,393.84x = 189,609.12 × 51,518.52
  4. Step 4: Simplify right side
    126,393.84x = 9,768,381,240.90
  5. Step 5: Solve for x
    x = 9,768,381,240.90/126,393.84
  6. Step 6: Final answer
    x = 77,285.26

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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.