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Finding the Fourth Proportional to 111,772.15, 154,232.63 and 64,022.65

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Solution

The fourth proportional to 111,772.15, 154,232.63 and 64,022.65 is: 88,343.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,772.15 : 154,232.63 = 64,022.65 : x
  2. Step 2: Convert to fraction form
    111,772.15/154,232.63 = 64,022.65/x
  3. Step 3: Cross multiply
    111,772.15x = 154,232.63 × 64,022.65
  4. Step 4: Simplify right side
    111,772.15x = 9,874,380,917.91
  5. Step 5: Solve for x
    x = 9,874,380,917.91/111,772.15
  6. Step 6: Final answer
    x = 88,343.84

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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.