Home / 138,650.69-191,337.99-78,234.14

Finding the Fourth Proportional to 138,650.69, 191,337.99 and 78,234.14

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Solution

The fourth proportional to 138,650.69, 191,337.99 and 78,234.14 is: 107,963.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,650.69 : 191,337.99 = 78,234.14 : x
  2. Step 2: Convert to fraction form
    138,650.69/191,337.99 = 78,234.14/x
  3. Step 3: Cross multiply
    138,650.69x = 191,337.99 × 78,234.14
  4. Step 4: Simplify right side
    138,650.69x = 14,969,163,096.98
  5. Step 5: Solve for x
    x = 14,969,163,096.98/138,650.69
  6. Step 6: Final answer
    x = 107,963.13

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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.