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Finding the Fourth Proportional to 57,758.41, 86,640.77 and 18,312.67

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Solution

The fourth proportional to 57,758.41, 86,640.77 and 18,312.67 is: 27,470.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,758.41 : 86,640.77 = 18,312.67 : x
  2. Step 2: Convert to fraction form
    57,758.41/86,640.77 = 18,312.67/x
  3. Step 3: Cross multiply
    57,758.41x = 86,640.77 × 18,312.67
  4. Step 4: Simplify right side
    57,758.41x = 1,586,623,829.56
  5. Step 5: Solve for x
    x = 1,586,623,829.56/57,758.41
  6. Step 6: Final answer
    x = 27,470.01

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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.