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Finding the Fourth Proportional to 139,556.30, 209,269.65 and 60,629.90

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Solution

The fourth proportional to 139,556.30, 209,269.65 and 60,629.90 is: 90,916.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,556.30 : 209,269.65 = 60,629.90 : x
  2. Step 2: Convert to fraction form
    139,556.30/209,269.65 = 60,629.90/x
  3. Step 3: Cross multiply
    139,556.30x = 209,269.65 × 60,629.90
  4. Step 4: Simplify right side
    139,556.30x = 12,687,997,952.54
  5. Step 5: Solve for x
    x = 12,687,997,952.54/139,556.30
  6. Step 6: Final answer
    x = 90,916.70

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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.