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Finding the Fourth Proportional to 126,397.99, 189,632.09 and 55,307.89

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Solution

The fourth proportional to 126,397.99, 189,632.09 and 55,307.89 is: 82,977.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,397.99 : 189,632.09 = 55,307.89 : x
  2. Step 2: Convert to fraction form
    126,397.99/189,632.09 = 55,307.89/x
  3. Step 3: Cross multiply
    126,397.99x = 189,632.09 × 55,307.89
  4. Step 4: Simplify right side
    126,397.99x = 10,488,150,774.19
  5. Step 5: Solve for x
    x = 10,488,150,774.19/126,397.99
  6. Step 6: Final answer
    x = 82,977.20

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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.