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Finding the Fourth Proportional to 57,429.80, 86,144.65 and 17,989.99

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Solution

The fourth proportional to 57,429.80, 86,144.65 and 17,989.99 is: 26,984.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,429.80 : 86,144.65 = 17,989.99 : x
  2. Step 2: Convert to fraction form
    57,429.80/86,144.65 = 17,989.99/x
  3. Step 3: Cross multiply
    57,429.80x = 86,144.65 × 17,989.99
  4. Step 4: Simplify right side
    57,429.80x = 1,549,741,302.10
  5. Step 5: Solve for x
    x = 1,549,741,302.10/57,429.80
  6. Step 6: Final answer
    x = 26,984.97

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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.