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Finding the Fourth Proportional to 85,644.92, 128,468.32 and 38,262.42

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Solution

The fourth proportional to 85,644.92, 128,468.32 and 38,262.42 is: 57,394.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,644.92 : 128,468.32 = 38,262.42 : x
  2. Step 2: Convert to fraction form
    85,644.92/128,468.32 = 38,262.42/x
  3. Step 3: Cross multiply
    85,644.92x = 128,468.32 × 38,262.42
  4. Step 4: Simplify right side
    85,644.92x = 4,915,508,816.53
  5. Step 5: Solve for x
    x = 4,915,508,816.53/85,644.92
  6. Step 6: Final answer
    x = 57,394.05

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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.