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Finding the Fourth Proportional to 221,418.16, 305,563.80 and 125,938.60

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Solution

The fourth proportional to 221,418.16, 305,563.80 and 125,938.60 is: 173,799.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,418.16 : 305,563.80 = 125,938.60 : x
  2. Step 2: Convert to fraction form
    221,418.16/305,563.80 = 125,938.60/x
  3. Step 3: Cross multiply
    221,418.16x = 305,563.80 × 125,938.60
  4. Step 4: Simplify right side
    221,418.16x = 38,482,277,182.68
  5. Step 5: Solve for x
    x = 38,482,277,182.68/221,418.16
  6. Step 6: Final answer
    x = 173,799.10

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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.