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Finding the Fourth Proportional to 100,668.84, 138,808.85 and 64,322.26

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Solution

The fourth proportional to 100,668.84, 138,808.85 and 64,322.26 is: 88,691.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,668.84 : 138,808.85 = 64,322.26 : x
  2. Step 2: Convert to fraction form
    100,668.84/138,808.85 = 64,322.26/x
  3. Step 3: Cross multiply
    100,668.84x = 138,808.85 × 64,322.26
  4. Step 4: Simplify right side
    100,668.84x = 8,928,498,940.00
  5. Step 5: Solve for x
    x = 8,928,498,940.00/100,668.84
  6. Step 6: Final answer
    x = 88,691.79

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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.