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Finding the Fourth Proportional to 242,649.40, 363,909.30 and 74,169.40

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Solution

The fourth proportional to 242,649.40, 363,909.30 and 74,169.40 is: 111,234.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,649.40 : 363,909.30 = 74,169.40 : x
  2. Step 2: Convert to fraction form
    242,649.40/363,909.30 = 74,169.40/x
  3. Step 3: Cross multiply
    242,649.40x = 363,909.30 × 74,169.40
  4. Step 4: Simplify right side
    242,649.40x = 26,990,934,435.42
  5. Step 5: Solve for x
    x = 26,990,934,435.42/242,649.40
  6. Step 6: Final answer
    x = 111,234.29

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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.