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Finding the Fourth Proportional to 67,117, 100,697.46 and 20,369.92

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Solution

The fourth proportional to 67,117, 100,697.46 and 20,369.92 is: 30,561.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,117 : 100,697.46 = 20,369.92 : x
  2. Step 2: Convert to fraction form
    67,117/100,697.46 = 20,369.92/x
  3. Step 3: Cross multiply
    67,117x = 100,697.46 × 20,369.92
  4. Step 4: Simplify right side
    67,117x = 2,051,199,204.40
  5. Step 5: Solve for x
    x = 2,051,199,204.40/67,117
  6. Step 6: Final answer
    x = 30,561.54

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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.