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Finding the Fourth Proportional to 171,978.14, 237,336.65 and 99,378.62

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Solution

The fourth proportional to 171,978.14, 237,336.65 and 99,378.62 is: 137,146.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,978.14 : 237,336.65 = 99,378.62 : x
  2. Step 2: Convert to fraction form
    171,978.14/237,336.65 = 99,378.62/x
  3. Step 3: Cross multiply
    171,978.14x = 237,336.65 × 99,378.62
  4. Step 4: Simplify right side
    171,978.14x = 23,586,188,752.42
  5. Step 5: Solve for x
    x = 23,586,188,752.42/171,978.14
  6. Step 6: Final answer
    x = 137,146.43

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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.