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Finding the Fourth Proportional to 70,827.62, 106,216.66 and 20,894.46

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Solution

The fourth proportional to 70,827.62, 106,216.66 and 20,894.46 is: 31,334.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,827.62 : 106,216.66 = 20,894.46 : x
  2. Step 2: Convert to fraction form
    70,827.62/106,216.66 = 20,894.46/x
  3. Step 3: Cross multiply
    70,827.62x = 106,216.66 × 20,894.46
  4. Step 4: Simplify right side
    70,827.62x = 2,219,339,753.70
  5. Step 5: Solve for x
    x = 2,219,339,753.70/70,827.62
  6. Step 6: Final answer
    x = 31,334.38

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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.