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Finding the Fourth Proportional to 139,600.72, 209,397.30 and 34,420.60

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Solution

The fourth proportional to 139,600.72, 209,397.30 and 34,420.60 is: 51,629.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,600.72 : 209,397.30 = 34,420.60 : x
  2. Step 2: Convert to fraction form
    139,600.72/209,397.30 = 34,420.60/x
  3. Step 3: Cross multiply
    139,600.72x = 209,397.30 × 34,420.60
  4. Step 4: Simplify right side
    139,600.72x = 7,207,580,704.38
  5. Step 5: Solve for x
    x = 7,207,580,704.38/139,600.72
  6. Step 6: Final answer
    x = 51,629.97

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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.