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Finding the Fourth Proportional to 139,631.70, 209,447.55 and 139,631.70

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Solution

The fourth proportional to 139,631.70, 209,447.55 and 139,631.70 is: 209,447.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,631.70 : 209,447.55 = 139,631.70 : x
  2. Step 2: Convert to fraction form
    139,631.70/209,447.55 = 139,631.70/x
  3. Step 3: Cross multiply
    139,631.70x = 209,447.55 × 139,631.70
  4. Step 4: Simplify right side
    139,631.70x = 29,245,517,467.34
  5. Step 5: Solve for x
    x = 29,245,517,467.34/139,631.70
  6. Step 6: Final answer
    x = 209,447.55

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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.