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Finding the Fourth Proportional to 242,404.20, 363,822.30 and 142,439.40

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Solution

The fourth proportional to 242,404.20, 363,822.30 and 142,439.40 is: 213,786.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,404.20 : 363,822.30 = 142,439.40 : x
  2. Step 2: Convert to fraction form
    242,404.20/363,822.30 = 142,439.40/x
  3. Step 3: Cross multiply
    242,404.20x = 363,822.30 × 142,439.40
  4. Step 4: Simplify right side
    242,404.20x = 51,822,630,118.62
  5. Step 5: Solve for x
    x = 51,822,630,118.62/242,404.20
  6. Step 6: Final answer
    x = 213,786.02

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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.