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Finding the Fourth Proportional to 201,381.20, 302,062.20 and 68,248.40

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Solution

The fourth proportional to 201,381.20, 302,062.20 and 68,248.40 is: 102,369.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,381.20 : 302,062.20 = 68,248.40 : x
  2. Step 2: Convert to fraction form
    201,381.20/302,062.20 = 68,248.40/x
  3. Step 3: Cross multiply
    201,381.20x = 302,062.20 × 68,248.40
  4. Step 4: Simplify right side
    201,381.20x = 20,615,261,850.48
  5. Step 5: Solve for x
    x = 20,615,261,850.48/201,381.20
  6. Step 6: Final answer
    x = 102,369.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.