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Finding the Fourth Proportional to 66,889.26, 100,308.78 and 21,900.24

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Solution

The fourth proportional to 66,889.26, 100,308.78 and 21,900.24 is: 32,842.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,889.26 : 100,308.78 = 21,900.24 : x
  2. Step 2: Convert to fraction form
    66,889.26/100,308.78 = 21,900.24/x
  3. Step 3: Cross multiply
    66,889.26x = 100,308.78 × 21,900.24
  4. Step 4: Simplify right side
    66,889.26x = 2,196,786,356.11
  5. Step 5: Solve for x
    x = 2,196,786,356.11/66,889.26
  6. Step 6: Final answer
    x = 32,842.14

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1.5x scale

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.