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Finding the Fourth Proportional to 72,808.79, 109,213.17 and 20,218.27

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Solution

The fourth proportional to 72,808.79, 109,213.17 and 20,218.27 is: 30,327.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,808.79 : 109,213.17 = 20,218.27 : x
  2. Step 2: Convert to fraction form
    72,808.79/109,213.17 = 20,218.27/x
  3. Step 3: Cross multiply
    72,808.79x = 109,213.17 × 20,218.27
  4. Step 4: Simplify right side
    72,808.79x = 2,208,101,085.58
  5. Step 5: Solve for x
    x = 2,208,101,085.58/72,808.79
  6. Step 6: Final answer
    x = 30,327.40

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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.