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Finding the Fourth Proportional to 71,606.20, 98,815.08 and 39,774.40

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Solution

The fourth proportional to 71,606.20, 98,815.08 and 39,774.40 is: 54,887.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,606.20 : 98,815.08 = 39,774.40 : x
  2. Step 2: Convert to fraction form
    71,606.20/98,815.08 = 39,774.40/x
  3. Step 3: Cross multiply
    71,606.20x = 98,815.08 × 39,774.40
  4. Step 4: Simplify right side
    71,606.20x = 3,930,310,517.95
  5. Step 5: Solve for x
    x = 3,930,310,517.95/71,606.20
  6. Step 6: Final answer
    x = 54,887.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.