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Finding the Fourth Proportional to 113,296.80, 169,961.40 and 38,420.40

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Solution

The fourth proportional to 113,296.80, 169,961.40 and 38,420.40 is: 57,636.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,296.80 : 169,961.40 = 38,420.40 : x
  2. Step 2: Convert to fraction form
    113,296.80/169,961.40 = 38,420.40/x
  3. Step 3: Cross multiply
    113,296.80x = 169,961.40 × 38,420.40
  4. Step 4: Simplify right side
    113,296.80x = 6,529,984,972.56
  5. Step 5: Solve for x
    x = 6,529,984,972.56/113,296.80
  6. Step 6: Final answer
    x = 57,636.09

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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.