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Finding the Fourth Proportional to 111,643.64, 154,024.74 and 63,234.44

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Solution

The fourth proportional to 111,643.64, 154,024.74 and 63,234.44 is: 87,238.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,643.64 : 154,024.74 = 63,234.44 : x
  2. Step 2: Convert to fraction form
    111,643.64/154,024.74 = 63,234.44/x
  3. Step 3: Cross multiply
    111,643.64x = 154,024.74 × 63,234.44
  4. Step 4: Simplify right side
    111,643.64x = 9,739,668,180.05
  5. Step 5: Solve for x
    x = 9,739,668,180.05/111,643.64
  6. Step 6: Final answer
    x = 87,238.90

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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.