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Finding the Fourth Proportional to 221,697.08, 305,975.60 and 124,910

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Solution

The fourth proportional to 221,697.08, 305,975.60 and 124,910 is: 172,394.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,697.08 : 305,975.60 = 124,910 : x
  2. Step 2: Convert to fraction form
    221,697.08/305,975.60 = 124,910/x
  3. Step 3: Cross multiply
    221,697.08x = 305,975.60 × 124,910
  4. Step 4: Simplify right side
    221,697.08x = 38,219,412,196
  5. Step 5: Solve for x
    x = 38,219,412,196/221,697.08
  6. Step 6: Final answer
    x = 172,394.75

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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.