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Finding the Fourth Proportional to 72,812.70, 109,219.09 and 20,222.18

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Solution

The fourth proportional to 72,812.70, 109,219.09 and 20,222.18 is: 30,333.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,812.70 : 109,219.09 = 20,222.18 : x
  2. Step 2: Convert to fraction form
    72,812.70/109,219.09 = 20,222.18/x
  3. Step 3: Cross multiply
    72,812.70x = 109,219.09 × 20,222.18
  4. Step 4: Simplify right side
    72,812.70x = 2,208,648,097.42
  5. Step 5: Solve for x
    x = 2,208,648,097.42/72,812.70
  6. Step 6: Final answer
    x = 30,333.28

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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.