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Finding the Fourth Proportional to 178,653.52, 246,377.30 and 121,378.57

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Solution

The fourth proportional to 178,653.52, 246,377.30 and 121,378.57 is: 167,390.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,653.52 : 246,377.30 = 121,378.57 : x
  2. Step 2: Convert to fraction form
    178,653.52/246,377.30 = 121,378.57/x
  3. Step 3: Cross multiply
    178,653.52x = 246,377.30 × 121,378.57
  4. Step 4: Simplify right side
    178,653.52x = 29,904,923,131.62
  5. Step 5: Solve for x
    x = 29,904,923,131.62/178,653.52
  6. Step 6: Final answer
    x = 167,390.62

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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.