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Finding the Fourth Proportional to 114,359.64, 171,539.86 and 80,978.73

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Solution

The fourth proportional to 114,359.64, 171,539.86 and 80,978.73 is: 121,468.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,359.64 : 171,539.86 = 80,978.73 : x
  2. Step 2: Convert to fraction form
    114,359.64/171,539.86 = 80,978.73/x
  3. Step 3: Cross multiply
    114,359.64x = 171,539.86 × 80,978.73
  4. Step 4: Simplify right side
    114,359.64x = 13,891,080,007.18
  5. Step 5: Solve for x
    x = 13,891,080,007.18/114,359.64
  6. Step 6: Final answer
    x = 121,468.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.