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Finding the Fourth Proportional to 67,003.34, 100,519.59 and 20,255

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Solution

The fourth proportional to 67,003.34, 100,519.59 and 20,255 is: 30,386.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,003.34 : 100,519.59 = 20,255 : x
  2. Step 2: Convert to fraction form
    67,003.34/100,519.59 = 20,255/x
  3. Step 3: Cross multiply
    67,003.34x = 100,519.59 × 20,255
  4. Step 4: Simplify right side
    67,003.34x = 2,036,024,295.45
  5. Step 5: Solve for x
    x = 2,036,024,295.45/67,003.34
  6. Step 6: Final answer
    x = 30,386.91

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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.