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Finding the Fourth Proportional to 111,745.17, 154,102.60 and 71,388.88

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Solution

The fourth proportional to 111,745.17, 154,102.60 and 71,388.88 is: 98,449.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,745.17 : 154,102.60 = 71,388.88 : x
  2. Step 2: Convert to fraction form
    111,745.17/154,102.60 = 71,388.88/x
  3. Step 3: Cross multiply
    111,745.17x = 154,102.60 × 71,388.88
  4. Step 4: Simplify right side
    111,745.17x = 11,001,211,723.07
  5. Step 5: Solve for x
    x = 11,001,211,723.07/111,745.17
  6. Step 6: Final answer
    x = 98,449.10

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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.