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Finding the Fourth Proportional to 57,990.54, 86,838.12 and 38,209.14

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Solution

The fourth proportional to 57,990.54, 86,838.12 and 38,209.14 is: 57,216.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,990.54 : 86,838.12 = 38,209.14 : x
  2. Step 2: Convert to fraction form
    57,990.54/86,838.12 = 38,209.14/x
  3. Step 3: Cross multiply
    57,990.54x = 86,838.12 × 38,209.14
  4. Step 4: Simplify right side
    57,990.54x = 3,318,009,884.42
  5. Step 5: Solve for x
    x = 3,318,009,884.42/57,990.54
  6. Step 6: Final answer
    x = 57,216.40

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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.