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Finding the Fourth Proportional to 68,205.70, 102,308.55 and 21,472.90

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Solution

The fourth proportional to 68,205.70, 102,308.55 and 21,472.90 is: 32,209.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,205.70 : 102,308.55 = 21,472.90 : x
  2. Step 2: Convert to fraction form
    68,205.70/102,308.55 = 21,472.90/x
  3. Step 3: Cross multiply
    68,205.70x = 102,308.55 × 21,472.90
  4. Step 4: Simplify right side
    68,205.70x = 2,196,861,263.30
  5. Step 5: Solve for x
    x = 2,196,861,263.30/68,205.70
  6. Step 6: Final answer
    x = 32,209.35

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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.