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Finding the Fourth Proportional to 72,809.35, 109,199.44 and 20,204.71

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Solution

The fourth proportional to 72,809.35, 109,199.44 and 20,204.71 is: 30,303.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,809.35 : 109,199.44 = 20,204.71 : x
  2. Step 2: Convert to fraction form
    72,809.35/109,199.44 = 20,204.71/x
  3. Step 3: Cross multiply
    72,809.35x = 109,199.44 × 20,204.71
  4. Step 4: Simplify right side
    72,809.35x = 2,206,343,017.36
  5. Step 5: Solve for x
    x = 2,206,343,017.36/72,809.35
  6. Step 6: Final answer
    x = 30,303.02

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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.