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Finding the Fourth Proportional to 155,339.55, 214,376.31 and 87,377.91

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Solution

The fourth proportional to 155,339.55, 214,376.31 and 87,377.91 is: 120,585.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,339.55 : 214,376.31 = 87,377.91 : x
  2. Step 2: Convert to fraction form
    155,339.55/214,376.31 = 87,377.91/x
  3. Step 3: Cross multiply
    155,339.55x = 214,376.31 × 87,377.91
  4. Step 4: Simplify right side
    155,339.55x = 18,731,753,921.31
  5. Step 5: Solve for x
    x = 18,731,753,921.31/155,339.55
  6. Step 6: Final answer
    x = 120,585.86

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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.