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Finding the Fourth Proportional to 57,750.72, 86,637 and 18,317.76

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Solution

The fourth proportional to 57,750.72, 86,637 and 18,317.76 is: 27,480.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,750.72 : 86,637 = 18,317.76 : x
  2. Step 2: Convert to fraction form
    57,750.72/86,637 = 18,317.76/x
  3. Step 3: Cross multiply
    57,750.72x = 86,637 × 18,317.76
  4. Step 4: Simplify right side
    57,750.72x = 1,586,995,773.12
  5. Step 5: Solve for x
    x = 1,586,995,773.12/57,750.72
  6. Step 6: Final answer
    x = 27,480.10

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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.