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Finding the Fourth Proportional to 221,087.79, 305,109.32 and 125,610.66

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Solution

The fourth proportional to 221,087.79, 305,109.32 and 125,610.66 is: 173,347.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,087.79 : 305,109.32 = 125,610.66 : x
  2. Step 2: Convert to fraction form
    221,087.79/305,109.32 = 125,610.66/x
  3. Step 3: Cross multiply
    221,087.79x = 305,109.32 × 125,610.66
  4. Step 4: Simplify right side
    221,087.79x = 38,324,982,429.30
  5. Step 5: Solve for x
    x = 38,324,982,429.30/221,087.79
  6. Step 6: Final answer
    x = 173,347.35

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1.5x scale

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.