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Finding the Fourth Proportional to 57,747.66, 86,611.77 and 20,335.50

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Solution

The fourth proportional to 57,747.66, 86,611.77 and 20,335.50 is: 30,499.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,747.66 : 86,611.77 = 20,335.50 : x
  2. Step 2: Convert to fraction form
    57,747.66/86,611.77 = 20,335.50/x
  3. Step 3: Cross multiply
    57,747.66x = 86,611.77 × 20,335.50
  4. Step 4: Simplify right side
    57,747.66x = 1,761,293,648.84
  5. Step 5: Solve for x
    x = 1,761,293,648.84/57,747.66
  6. Step 6: Final answer
    x = 30,499.83

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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.