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Finding the Fourth Proportional to 139,953.32, 209,622.26 and 115,662.33

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Solution

The fourth proportional to 139,953.32, 209,622.26 and 115,662.33 is: 173,239.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,953.32 : 209,622.26 = 115,662.33 : x
  2. Step 2: Convert to fraction form
    139,953.32/209,622.26 = 115,662.33/x
  3. Step 3: Cross multiply
    139,953.32x = 209,622.26 × 115,662.33
  4. Step 4: Simplify right side
    139,953.32x = 24,245,399,011.47
  5. Step 5: Solve for x
    x = 24,245,399,011.47/139,953.32
  6. Step 6: Final answer
    x = 173,239.18

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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.