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Finding the Fourth Proportional to 142,408.80, 213,440.40 and 63,439.20

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Solution

The fourth proportional to 142,408.80, 213,440.40 and 63,439.20 is: 95,081.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,408.80 : 213,440.40 = 63,439.20 : x
  2. Step 2: Convert to fraction form
    142,408.80/213,440.40 = 63,439.20/x
  3. Step 3: Cross multiply
    142,408.80x = 213,440.40 × 63,439.20
  4. Step 4: Simplify right side
    142,408.80x = 13,540,488,223.68
  5. Step 5: Solve for x
    x = 13,540,488,223.68/142,408.80
  6. Step 6: Final answer
    x = 95,081.82

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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.