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Finding the Fourth Proportional to 113,372.80, 169,913.40 and 68,952.40

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Solution

The fourth proportional to 113,372.80, 169,913.40 and 68,952.40 is: 103,339.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,372.80 : 169,913.40 = 68,952.40 : x
  2. Step 2: Convert to fraction form
    113,372.80/169,913.40 = 68,952.40/x
  3. Step 3: Cross multiply
    113,372.80x = 169,913.40 × 68,952.40
  4. Step 4: Simplify right side
    113,372.80x = 11,715,936,722.16
  5. Step 5: Solve for x
    x = 11,715,936,722.16/113,372.80
  6. Step 6: Final answer
    x = 103,339.93

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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.