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Finding the Fourth Proportional to 67,299.36, 100,963.89 and 20,555.88

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Solution

The fourth proportional to 67,299.36, 100,963.89 and 20,555.88 is: 30,838.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,299.36 : 100,963.89 = 20,555.88 : x
  2. Step 2: Convert to fraction form
    67,299.36/100,963.89 = 20,555.88/x
  3. Step 3: Cross multiply
    67,299.36x = 100,963.89 × 20,555.88
  4. Step 4: Simplify right side
    67,299.36x = 2,075,401,607.17
  5. Step 5: Solve for x
    x = 2,075,401,607.17/67,299.36
  6. Step 6: Final answer
    x = 30,838.36

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1.5x scale

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.