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Finding the Fourth Proportional to 85,724.44, 128,617.44 and 38,335.48

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Solution

The fourth proportional to 85,724.44, 128,617.44 and 38,335.48 is: 57,516.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,724.44 : 128,617.44 = 38,335.48 : x
  2. Step 2: Convert to fraction form
    85,724.44/128,617.44 = 38,335.48/x
  3. Step 3: Cross multiply
    85,724.44x = 128,617.44 × 38,335.48
  4. Step 4: Simplify right side
    85,724.44x = 4,930,611,298.77
  5. Step 5: Solve for x
    x = 4,930,611,298.77/85,724.44
  6. Step 6: Final answer
    x = 57,516.98

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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.