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Finding the Fourth Proportional to 85,226.76, 127,856.34 and 38,479.50

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Solution

The fourth proportional to 85,226.76, 127,856.34 and 38,479.50 is: 57,726.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,226.76 : 127,856.34 = 38,479.50 : x
  2. Step 2: Convert to fraction form
    85,226.76/127,856.34 = 38,479.50/x
  3. Step 3: Cross multiply
    85,226.76x = 127,856.34 × 38,479.50
  4. Step 4: Simplify right side
    85,226.76x = 4,919,848,035.03
  5. Step 5: Solve for x
    x = 4,919,848,035.03/85,226.76
  6. Step 6: Final answer
    x = 57,726.56

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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.