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Finding the Fourth Proportional to 57,390.21, 86,090.27 and 15,837.21

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Solution

The fourth proportional to 57,390.21, 86,090.27 and 15,837.21 is: 23,757.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,390.21 : 86,090.27 = 15,837.21 : x
  2. Step 2: Convert to fraction form
    57,390.21/86,090.27 = 15,837.21/x
  3. Step 3: Cross multiply
    57,390.21x = 86,090.27 × 15,837.21
  4. Step 4: Simplify right side
    57,390.21x = 1,363,429,605.76
  5. Step 5: Solve for x
    x = 1,363,429,605.76/57,390.21
  6. Step 6: Final answer
    x = 23,757.18

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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.