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Finding the Fourth Proportional to 67,605, 101,407.90 and 18,357

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Solution

The fourth proportional to 67,605, 101,407.90 and 18,357 is: 27,535.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,605 : 101,407.90 = 18,357 : x
  2. Step 2: Convert to fraction form
    67,605/101,407.90 = 18,357/x
  3. Step 3: Cross multiply
    67,605x = 101,407.90 × 18,357
  4. Step 4: Simplify right side
    67,605x = 1,861,544,820.30
  5. Step 5: Solve for x
    x = 1,861,544,820.30/67,605
  6. Step 6: Final answer
    x = 27,535.61

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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.