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Finding the Fourth Proportional to 103,682.67, 155,830.74 and 86,027.86

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Solution

The fourth proportional to 103,682.67, 155,830.74 and 86,027.86 is: 129,296.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,682.67 : 155,830.74 = 86,027.86 : x
  2. Step 2: Convert to fraction form
    103,682.67/155,830.74 = 86,027.86/x
  3. Step 3: Cross multiply
    103,682.67x = 155,830.74 × 86,027.86
  4. Step 4: Simplify right side
    103,682.67x = 13,405,785,084.42
  5. Step 5: Solve for x
    x = 13,405,785,084.42/103,682.67
  6. Step 6: Final answer
    x = 129,296.29

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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.