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Finding the Fourth Proportional to 115,355.80, 173,033.70 and 103,691.80

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Solution

The fourth proportional to 115,355.80, 173,033.70 and 103,691.80 is: 155,537.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,355.80 : 173,033.70 = 103,691.80 : x
  2. Step 2: Convert to fraction form
    115,355.80/173,033.70 = 103,691.80/x
  3. Step 3: Cross multiply
    115,355.80x = 173,033.70 × 103,691.80
  4. Step 4: Simplify right side
    115,355.80x = 17,942,175,813.66
  5. Step 5: Solve for x
    x = 17,942,175,813.66/115,355.80
  6. Step 6: Final answer
    x = 155,537.70

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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.