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Finding the Fourth Proportional to 100,986.92, 139,364.88 and 55,665.44

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Solution

The fourth proportional to 100,986.92, 139,364.88 and 55,665.44 is: 76,819.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,986.92 : 139,364.88 = 55,665.44 : x
  2. Step 2: Convert to fraction form
    100,986.92/139,364.88 = 55,665.44/x
  3. Step 3: Cross multiply
    100,986.92x = 139,364.88 × 55,665.44
  4. Step 4: Simplify right side
    100,986.92x = 7,757,806,668.92
  5. Step 5: Solve for x
    x = 7,757,806,668.92/100,986.92
  6. Step 6: Final answer
    x = 76,819.92

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1.5x scale

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.