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Finding the Fourth Proportional to 57,810.72, 86,725.80 and 18,378.96

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Solution

The fourth proportional to 57,810.72, 86,725.80 and 18,378.96 is: 27,571.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,810.72 : 86,725.80 = 18,378.96 : x
  2. Step 2: Convert to fraction form
    57,810.72/86,725.80 = 18,378.96/x
  3. Step 3: Cross multiply
    57,810.72x = 86,725.80 × 18,378.96
  4. Step 4: Simplify right side
    57,810.72x = 1,593,930,009.17
  5. Step 5: Solve for x
    x = 1,593,930,009.17/57,810.72
  6. Step 6: Final answer
    x = 27,571.53

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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.