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Finding the Fourth Proportional to 111,406.47, 153,738.21 and 63,656.73

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Solution

The fourth proportional to 111,406.47, 153,738.21 and 63,656.73 is: 87,844.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,406.47 : 153,738.21 = 63,656.73 : x
  2. Step 2: Convert to fraction form
    111,406.47/153,738.21 = 63,656.73/x
  3. Step 3: Cross multiply
    111,406.47x = 153,738.21 × 63,656.73
  4. Step 4: Simplify right side
    111,406.47x = 9,786,471,724.65
  5. Step 5: Solve for x
    x = 9,786,471,724.65/111,406.47
  6. Step 6: Final answer
    x = 87,844.73

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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.