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Finding the Fourth Proportional to 57,985.35, 86,978.43 and 15,864.54

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Solution

The fourth proportional to 57,985.35, 86,978.43 and 15,864.54 is: 23,796.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,985.35 : 86,978.43 = 15,864.54 : x
  2. Step 2: Convert to fraction form
    57,985.35/86,978.43 = 15,864.54/x
  3. Step 3: Cross multiply
    57,985.35x = 86,978.43 × 15,864.54
  4. Step 4: Simplify right side
    57,985.35x = 1,379,872,781.87
  5. Step 5: Solve for x
    x = 1,379,872,781.87/57,985.35
  6. Step 6: Final answer
    x = 23,796.92

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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.