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Finding the Fourth Proportional to 111,698.46, 154,179.81 and 71,520.48

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Solution

The fourth proportional to 111,698.46, 154,179.81 and 71,520.48 is: 98,721.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,698.46 : 154,179.81 = 71,520.48 : x
  2. Step 2: Convert to fraction form
    111,698.46/154,179.81 = 71,520.48/x
  3. Step 3: Cross multiply
    111,698.46x = 154,179.81 × 71,520.48
  4. Step 4: Simplify right side
    111,698.46x = 11,027,014,017.51
  5. Step 5: Solve for x
    x = 11,027,014,017.51/111,698.46
  6. Step 6: Final answer
    x = 98,721.27

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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.