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Finding the Fourth Proportional to 146,408.70, 219,613.05 and 128,912.70

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Solution

The fourth proportional to 146,408.70, 219,613.05 and 128,912.70 is: 193,369.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,408.70 : 219,613.05 = 128,912.70 : x
  2. Step 2: Convert to fraction form
    146,408.70/219,613.05 = 128,912.70/x
  3. Step 3: Cross multiply
    146,408.70x = 219,613.05 × 128,912.70
  4. Step 4: Simplify right side
    146,408.70x = 28,310,911,230.74
  5. Step 5: Solve for x
    x = 28,310,911,230.74/146,408.70
  6. Step 6: Final answer
    x = 193,369.05

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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.