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Finding the Fourth Proportional to 139,905.70, 209,781.60 and 95,582.50

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Solution

The fourth proportional to 139,905.70, 209,781.60 and 95,582.50 is: 143,321.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,905.70 : 209,781.60 = 95,582.50 : x
  2. Step 2: Convert to fraction form
    139,905.70/209,781.60 = 95,582.50/x
  3. Step 3: Cross multiply
    139,905.70x = 209,781.60 × 95,582.50
  4. Step 4: Simplify right side
    139,905.70x = 20,051,449,782
  5. Step 5: Solve for x
    x = 20,051,449,782/139,905.70
  6. Step 6: Final answer
    x = 143,321.18

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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.