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Finding the Fourth Proportional to 67,637.70, 101,469.30 and 20,879.64

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Solution

The fourth proportional to 67,637.70, 101,469.30 and 20,879.64 is: 31,323.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,637.70 : 101,469.30 = 20,879.64 : x
  2. Step 2: Convert to fraction form
    67,637.70/101,469.30 = 20,879.64/x
  3. Step 3: Cross multiply
    67,637.70x = 101,469.30 × 20,879.64
  4. Step 4: Simplify right side
    67,637.70x = 2,118,642,455.05
  5. Step 5: Solve for x
    x = 2,118,642,455.05/67,637.70
  6. Step 6: Final answer
    x = 31,323.40

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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.