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Finding the Fourth Proportional to 72,794.40, 109,191.54 and 20,203.86

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Solution

The fourth proportional to 72,794.40, 109,191.54 and 20,203.86 is: 30,305.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,794.40 : 109,191.54 = 20,203.86 : x
  2. Step 2: Convert to fraction form
    72,794.40/109,191.54 = 20,203.86/x
  3. Step 3: Cross multiply
    72,794.40x = 109,191.54 × 20,203.86
  4. Step 4: Simplify right side
    72,794.40x = 2,206,090,587.34
  5. Step 5: Solve for x
    x = 2,206,090,587.34/72,794.40
  6. Step 6: Final answer
    x = 30,305.77

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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.