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Finding the Fourth Proportional to 115,429.70, 173,144.55 and 75,512.90

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Solution

The fourth proportional to 115,429.70, 173,144.55 and 75,512.90 is: 113,269.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,429.70 : 173,144.55 = 75,512.90 : x
  2. Step 2: Convert to fraction form
    115,429.70/173,144.55 = 75,512.90/x
  3. Step 3: Cross multiply
    115,429.70x = 173,144.55 × 75,512.90
  4. Step 4: Simplify right side
    115,429.70x = 13,074,647,089.70
  5. Step 5: Solve for x
    x = 13,074,647,089.70/115,429.70
  6. Step 6: Final answer
    x = 113,269.35

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1.5x scale

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.