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Finding the Fourth Proportional to 100,668.06, 138,922.20 and 55,350.68

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Solution

The fourth proportional to 100,668.06, 138,922.20 and 55,350.68 is: 76,384.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,668.06 : 138,922.20 = 55,350.68 : x
  2. Step 2: Convert to fraction form
    100,668.06/138,922.20 = 55,350.68/x
  3. Step 3: Cross multiply
    100,668.06x = 138,922.20 × 55,350.68
  4. Step 4: Simplify right side
    100,668.06x = 7,689,437,542.49
  5. Step 5: Solve for x
    x = 7,689,437,542.49/100,668.06
  6. Step 6: Final answer
    x = 76,384.08

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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.