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Finding the Fourth Proportional to 221,693.68, 305,945.78 and 124,936.05

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Solution

The fourth proportional to 221,693.68, 305,945.78 and 124,936.05 is: 172,416.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,693.68 : 305,945.78 = 124,936.05 : x
  2. Step 2: Convert to fraction form
    221,693.68/305,945.78 = 124,936.05/x
  3. Step 3: Cross multiply
    221,693.68x = 305,945.78 × 124,936.05
  4. Step 4: Simplify right side
    221,693.68x = 38,223,657,267.37
  5. Step 5: Solve for x
    x = 38,223,657,267.37/221,693.68
  6. Step 6: Final answer
    x = 172,416.54

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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.