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Finding the Fourth Proportional to 57,578.66, 86,376.28 and 18,138.94

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Solution

The fourth proportional to 57,578.66, 86,376.28 and 18,138.94 is: 27,211.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,578.66 : 86,376.28 = 18,138.94 : x
  2. Step 2: Convert to fraction form
    57,578.66/86,376.28 = 18,138.94/x
  3. Step 3: Cross multiply
    57,578.66x = 86,376.28 × 18,138.94
  4. Step 4: Simplify right side
    57,578.66x = 1,566,774,160.34
  5. Step 5: Solve for x
    x = 1,566,774,160.34/57,578.66
  6. Step 6: Final answer
    x = 27,211.02

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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.