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Finding the Fourth Proportional to 67,636.69, 101,467.79 and 20,878.63

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Solution

The fourth proportional to 67,636.69, 101,467.79 and 20,878.63 is: 31,321.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,636.69 : 101,467.79 = 20,878.63 : x
  2. Step 2: Convert to fraction form
    67,636.69/101,467.79 = 20,878.63/x
  3. Step 3: Cross multiply
    67,636.69x = 101,467.79 × 20,878.63
  4. Step 4: Simplify right side
    67,636.69x = 2,118,508,444.33
  5. Step 5: Solve for x
    x = 2,118,508,444.33/67,636.69
  6. Step 6: Final answer
    x = 31,321.88

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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.