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Finding the Fourth Proportional to 100,993.17, 139,364.31 and 55,668.81

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Solution

The fourth proportional to 100,993.17, 139,364.31 and 55,668.81 is: 76,819.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,993.17 : 139,364.31 = 55,668.81 : x
  2. Step 2: Convert to fraction form
    100,993.17/139,364.31 = 55,668.81/x
  3. Step 3: Cross multiply
    100,993.17x = 139,364.31 × 55,668.81
  4. Step 4: Simplify right side
    100,993.17x = 7,758,245,294.17
  5. Step 5: Solve for x
    x = 7,758,245,294.17/100,993.17
  6. Step 6: Final answer
    x = 76,819.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.