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Finding the Fourth Proportional to 85,540.80, 128,330.40 and 50,462.40

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Solution

The fourth proportional to 85,540.80, 128,330.40 and 50,462.40 is: 75,704.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,540.80 : 128,330.40 = 50,462.40 : x
  2. Step 2: Convert to fraction form
    85,540.80/128,330.40 = 50,462.40/x
  3. Step 3: Cross multiply
    85,540.80x = 128,330.40 × 50,462.40
  4. Step 4: Simplify right side
    85,540.80x = 6,475,859,976.96
  5. Step 5: Solve for x
    x = 6,475,859,976.96/85,540.80
  6. Step 6: Final answer
    x = 75,704.93

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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.