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Finding the Fourth Proportional to 85,596.60, 128,337.30 and 38,825.40

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Solution

The fourth proportional to 85,596.60, 128,337.30 and 38,825.40 is: 58,211.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,596.60 : 128,337.30 = 38,825.40 : x
  2. Step 2: Convert to fraction form
    85,596.60/128,337.30 = 38,825.40/x
  3. Step 3: Cross multiply
    85,596.60x = 128,337.30 × 38,825.40
  4. Step 4: Simplify right side
    85,596.60x = 4,982,747,007.42
  5. Step 5: Solve for x
    x = 4,982,747,007.42/85,596.60
  6. Step 6: Final answer
    x = 58,211.97

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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.