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Finding the Fourth Proportional to 71,276.54, 98,364.72 and 39,445.45

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Solution

The fourth proportional to 71,276.54, 98,364.72 and 39,445.45 is: 54,436.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,276.54 : 98,364.72 = 39,445.45 : x
  2. Step 2: Convert to fraction form
    71,276.54/98,364.72 = 39,445.45/x
  3. Step 3: Cross multiply
    71,276.54x = 98,364.72 × 39,445.45
  4. Step 4: Simplify right side
    71,276.54x = 3,880,040,447.30
  5. Step 5: Solve for x
    x = 3,880,040,447.30/71,276.54
  6. Step 6: Final answer
    x = 54,436.43

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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.