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Finding the Fourth Proportional to 71,445.92, 98,584.82 and 39,615.05

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Solution

The fourth proportional to 71,445.92, 98,584.82 and 39,615.05 is: 54,662.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,445.92 : 98,584.82 = 39,615.05 : x
  2. Step 2: Convert to fraction form
    71,445.92/98,584.82 = 39,615.05/x
  3. Step 3: Cross multiply
    71,445.92x = 98,584.82 × 39,615.05
  4. Step 4: Simplify right side
    71,445.92x = 3,905,442,573.54
  5. Step 5: Solve for x
    x = 3,905,442,573.54/71,445.92
  6. Step 6: Final answer
    x = 54,662.92

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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.