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Finding the Fourth Proportional to 72,673.17, 109,009.80 and 20,082.70

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Solution

The fourth proportional to 72,673.17, 109,009.80 and 20,082.70 is: 30,124.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,673.17 : 109,009.80 = 20,082.70 : x
  2. Step 2: Convert to fraction form
    72,673.17/109,009.80 = 20,082.70/x
  3. Step 3: Cross multiply
    72,673.17x = 109,009.80 × 20,082.70
  4. Step 4: Simplify right side
    72,673.17x = 2,189,211,110.46
  5. Step 5: Solve for x
    x = 2,189,211,110.46/72,673.17
  6. Step 6: Final answer
    x = 30,124.06

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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.