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Finding the Fourth Proportional to 111,192, 153,444.96 and 66,490.56

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Solution

The fourth proportional to 111,192, 153,444.96 and 66,490.56 is: 91,756.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,192 : 153,444.96 = 66,490.56 : x
  2. Step 2: Convert to fraction form
    111,192/153,444.96 = 66,490.56/x
  3. Step 3: Cross multiply
    111,192x = 153,444.96 × 66,490.56
  4. Step 4: Simplify right side
    111,192x = 10,202,641,319.58
  5. Step 5: Solve for x
    x = 10,202,641,319.58/111,192
  6. Step 6: Final answer
    x = 91,756.97

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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.