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Finding the Fourth Proportional to 221,843.79, 306,137.60 and 126,364.11

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Solution

The fourth proportional to 221,843.79, 306,137.60 and 126,364.11 is: 174,378.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,843.79 : 306,137.60 = 126,364.11 : x
  2. Step 2: Convert to fraction form
    221,843.79/306,137.60 = 126,364.11/x
  3. Step 3: Cross multiply
    221,843.79x = 306,137.60 × 126,364.11
  4. Step 4: Simplify right side
    221,843.79x = 38,684,804,729.72
  5. Step 5: Solve for x
    x = 38,684,804,729.72/221,843.79
  6. Step 6: Final answer
    x = 174,378.58

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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.