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Finding the Fourth Proportional to 57,128.53, 85,691.89 and 15,575.53

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Solution

The fourth proportional to 57,128.53, 85,691.89 and 15,575.53 is: 23,363.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,128.53 : 85,691.89 = 15,575.53 : x
  2. Step 2: Convert to fraction form
    57,128.53/85,691.89 = 15,575.53/x
  3. Step 3: Cross multiply
    57,128.53x = 85,691.89 × 15,575.53
  4. Step 4: Simplify right side
    57,128.53x = 1,334,696,603.45
  5. Step 5: Solve for x
    x = 1,334,696,603.45/57,128.53
  6. Step 6: Final answer
    x = 23,363.05

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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.