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Finding the Fourth Proportional to 71,511.75, 98,682.80 and 39,245.60

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Solution

The fourth proportional to 71,511.75, 98,682.80 and 39,245.60 is: 54,157.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,511.75 : 98,682.80 = 39,245.60 : x
  2. Step 2: Convert to fraction form
    71,511.75/98,682.80 = 39,245.60/x
  3. Step 3: Cross multiply
    71,511.75x = 98,682.80 × 39,245.60
  4. Step 4: Simplify right side
    71,511.75x = 3,872,865,746.16
  5. Step 5: Solve for x
    x = 3,872,865,746.16/71,511.75
  6. Step 6: Final answer
    x = 54,157.05

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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.