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Finding the Fourth Proportional to 65,801.72, 90,818.08 and 38,959.14

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Solution

The fourth proportional to 65,801.72, 90,818.08 and 38,959.14 is: 53,770.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,801.72 : 90,818.08 = 38,959.14 : x
  2. Step 2: Convert to fraction form
    65,801.72/90,818.08 = 38,959.14/x
  3. Step 3: Cross multiply
    65,801.72x = 90,818.08 × 38,959.14
  4. Step 4: Simplify right side
    65,801.72x = 3,538,194,293.25
  5. Step 5: Solve for x
    x = 3,538,194,293.25/65,801.72
  6. Step 6: Final answer
    x = 53,770.54

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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.