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Finding the Fourth Proportional to 57,128.79, 85,692.26 and 15,575.79

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Solution

The fourth proportional to 57,128.79, 85,692.26 and 15,575.79 is: 23,363.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,128.79 : 85,692.26 = 15,575.79 : x
  2. Step 2: Convert to fraction form
    57,128.79/85,692.26 = 15,575.79/x
  3. Step 3: Cross multiply
    57,128.79x = 85,692.26 × 15,575.79
  4. Step 4: Simplify right side
    57,128.79x = 1,334,724,646.39
  5. Step 5: Solve for x
    x = 1,334,724,646.39/57,128.79
  6. Step 6: Final answer
    x = 23,363.43

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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.