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Finding the Fourth Proportional to 67,119, 100,700.46 and 20,371.92

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Solution

The fourth proportional to 67,119, 100,700.46 and 20,371.92 is: 30,564.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,119 : 100,700.46 = 20,371.92 : x
  2. Step 2: Convert to fraction form
    67,119/100,700.46 = 20,371.92/x
  3. Step 3: Cross multiply
    67,119x = 100,700.46 × 20,371.92
  4. Step 4: Simplify right side
    67,119x = 2,051,461,715.08
  5. Step 5: Solve for x
    x = 2,051,461,715.08/67,119
  6. Step 6: Final answer
    x = 30,564.55

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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.