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Finding the Fourth Proportional to 201,391.20, 302,077.20 and 68,258.40

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Solution

The fourth proportional to 201,391.20, 302,077.20 and 68,258.40 is: 102,384.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,391.20 : 302,077.20 = 68,258.40 : x
  2. Step 2: Convert to fraction form
    201,391.20/302,077.20 = 68,258.40/x
  3. Step 3: Cross multiply
    201,391.20x = 302,077.20 × 68,258.40
  4. Step 4: Simplify right side
    201,391.20x = 20,619,306,348.48
  5. Step 5: Solve for x
    x = 20,619,306,348.48/201,391.20
  6. Step 6: Final answer
    x = 102,384.35

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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.