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Finding the Fourth Proportional to 111,439.94, 153,749.75 and 63,659.48

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Solution

The fourth proportional to 111,439.94, 153,749.75 and 63,659.48 is: 87,828.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,439.94 : 153,749.75 = 63,659.48 : x
  2. Step 2: Convert to fraction form
    111,439.94/153,749.75 = 63,659.48/x
  3. Step 3: Cross multiply
    111,439.94x = 153,749.75 × 63,659.48
  4. Step 4: Simplify right side
    111,439.94x = 9,787,628,048.08
  5. Step 5: Solve for x
    x = 9,787,628,048.08/111,439.94
  6. Step 6: Final answer
    x = 87,828.73

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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.