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Finding the Fourth Proportional to 72,813.69, 109,221.26 and 20,223.45

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Solution

The fourth proportional to 72,813.69, 109,221.26 and 20,223.45 is: 30,335.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,813.69 : 109,221.26 = 20,223.45 : x
  2. Step 2: Convert to fraction form
    72,813.69/109,221.26 = 20,223.45/x
  3. Step 3: Cross multiply
    72,813.69x = 109,221.26 × 20,223.45
  4. Step 4: Simplify right side
    72,813.69x = 2,208,830,589.43
  5. Step 5: Solve for x
    x = 2,208,830,589.43/72,813.69
  6. Step 6: Final answer
    x = 30,335.37

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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.