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Finding the Fourth Proportional to 87,090.61, 130,414.33 and 57,418.42

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Solution

The fourth proportional to 87,090.61, 130,414.33 and 57,418.42 is: 85,981.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,090.61 : 130,414.33 = 57,418.42 : x
  2. Step 2: Convert to fraction form
    87,090.61/130,414.33 = 57,418.42/x
  3. Step 3: Cross multiply
    87,090.61x = 130,414.33 × 57,418.42
  4. Step 4: Simplify right side
    87,090.61x = 7,488,184,773.96
  5. Step 5: Solve for x
    x = 7,488,184,773.96/87,090.61
  6. Step 6: Final answer
    x = 85,981.54

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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.