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Finding the Fourth Proportional to 57,573.16, 86,370.68 and 20,143.87

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Solution

The fourth proportional to 57,573.16, 86,370.68 and 20,143.87 is: 30,219.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,573.16 : 86,370.68 = 20,143.87 : x
  2. Step 2: Convert to fraction form
    57,573.16/86,370.68 = 20,143.87/x
  3. Step 3: Cross multiply
    57,573.16x = 86,370.68 × 20,143.87
  4. Step 4: Simplify right side
    57,573.16x = 1,739,839,649.01
  5. Step 5: Solve for x
    x = 1,739,839,649.01/57,573.16
  6. Step 6: Final answer
    x = 30,219.63

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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.