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Finding the Fourth Proportional to 67,256.70, 100,884.78 and 20,509.44

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Solution

The fourth proportional to 67,256.70, 100,884.78 and 20,509.44 is: 30,764.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,256.70 : 100,884.78 = 20,509.44 : x
  2. Step 2: Convert to fraction form
    67,256.70/100,884.78 = 20,509.44/x
  3. Step 3: Cross multiply
    67,256.70x = 100,884.78 × 20,509.44
  4. Step 4: Simplify right side
    67,256.70x = 2,069,090,342.32
  5. Step 5: Solve for x
    x = 2,069,090,342.32/67,256.70
  6. Step 6: Final answer
    x = 30,764.08

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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.