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Finding the Fourth Proportional to 111,811.76, 154,299.36 and 63,422.90

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Solution

The fourth proportional to 111,811.76, 154,299.36 and 63,422.90 is: 87,523.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,811.76 : 154,299.36 = 63,422.90 : x
  2. Step 2: Convert to fraction form
    111,811.76/154,299.36 = 63,422.90/x
  3. Step 3: Cross multiply
    111,811.76x = 154,299.36 × 63,422.90
  4. Step 4: Simplify right side
    111,811.76x = 9,786,112,879.34
  5. Step 5: Solve for x
    x = 9,786,112,879.34/111,811.76
  6. Step 6: Final answer
    x = 87,523.11

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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.