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Finding the Fourth Proportional to 61,181.61, 91,761.45 and 38,928.88

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Solution

The fourth proportional to 61,181.61, 91,761.45 and 38,928.88 is: 58,386.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,181.61 : 91,761.45 = 38,928.88 : x
  2. Step 2: Convert to fraction form
    61,181.61/91,761.45 = 38,928.88/x
  3. Step 3: Cross multiply
    61,181.61x = 91,761.45 × 38,928.88
  4. Step 4: Simplify right side
    61,181.61x = 3,572,170,475.68
  5. Step 5: Solve for x
    x = 3,572,170,475.68/61,181.61
  6. Step 6: Final answer
    x = 58,386.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.