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Finding the Fourth Proportional to 142,638.40, 213,876.60 and 53,894.80

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Solution

The fourth proportional to 142,638.40, 213,876.60 and 53,894.80 is: 80,811.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,638.40 : 213,876.60 = 53,894.80 : x
  2. Step 2: Convert to fraction form
    142,638.40/213,876.60 = 53,894.80/x
  3. Step 3: Cross multiply
    142,638.40x = 213,876.60 × 53,894.80
  4. Step 4: Simplify right side
    142,638.40x = 11,526,836,581.68
  5. Step 5: Solve for x
    x = 11,526,836,581.68/142,638.40
  6. Step 6: Final answer
    x = 80,811.59

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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.