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Finding the Fourth Proportional to 124,377.85, 171,505.92 and 84,021.58

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Solution

The fourth proportional to 124,377.85, 171,505.92 and 84,021.58 is: 115,858.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,377.85 : 171,505.92 = 84,021.58 : x
  2. Step 2: Convert to fraction form
    124,377.85/171,505.92 = 84,021.58/x
  3. Step 3: Cross multiply
    124,377.85x = 171,505.92 × 84,021.58
  4. Step 4: Simplify right side
    124,377.85x = 14,410,198,377.75
  5. Step 5: Solve for x
    x = 14,410,198,377.75/124,377.85
  6. Step 6: Final answer
    x = 115,858.24

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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.