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Finding the Fourth Proportional to 57,480, 86,219.91 and 18,040.14

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Solution

The fourth proportional to 57,480, 86,219.91 and 18,040.14 is: 27,060.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,480 : 86,219.91 = 18,040.14 : x
  2. Step 2: Convert to fraction form
    57,480/86,219.91 = 18,040.14/x
  3. Step 3: Cross multiply
    57,480x = 86,219.91 × 18,040.14
  4. Step 4: Simplify right side
    57,480x = 1,555,419,247.19
  5. Step 5: Solve for x
    x = 1,555,419,247.19/57,480
  6. Step 6: Final answer
    x = 27,060.18

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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.