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Finding the Fourth Proportional to 69,989.57, 104,962.82 and 20,056.28

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Solution

The fourth proportional to 69,989.57, 104,962.82 and 20,056.28 is: 30,078.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,989.57 : 104,962.82 = 20,056.28 : x
  2. Step 2: Convert to fraction form
    69,989.57/104,962.82 = 20,056.28/x
  3. Step 3: Cross multiply
    69,989.57x = 104,962.82 × 20,056.28
  4. Step 4: Simplify right side
    69,989.57x = 2,105,163,082.41
  5. Step 5: Solve for x
    x = 2,105,163,082.41/69,989.57
  6. Step 6: Final answer
    x = 30,078.24

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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.