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Finding the Fourth Proportional to 73,119.67, 109,685.72 and 20,529.15

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Solution

The fourth proportional to 73,119.67, 109,685.72 and 20,529.15 is: 30,795.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,119.67 : 109,685.72 = 20,529.15 : x
  2. Step 2: Convert to fraction form
    73,119.67/109,685.72 = 20,529.15/x
  3. Step 3: Cross multiply
    73,119.67x = 109,685.72 × 20,529.15
  4. Step 4: Simplify right side
    73,119.67x = 2,251,754,598.74
  5. Step 5: Solve for x
    x = 2,251,754,598.74/73,119.67
  6. Step 6: Final answer
    x = 30,795.47

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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.