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Finding the Fourth Proportional to 146,211.70, 219,317.55 and 121,279.90

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Solution

The fourth proportional to 146,211.70, 219,317.55 and 121,279.90 is: 181,919.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,211.70 : 219,317.55 = 121,279.90 : x
  2. Step 2: Convert to fraction form
    146,211.70/219,317.55 = 121,279.90/x
  3. Step 3: Cross multiply
    146,211.70x = 219,317.55 × 121,279.90
  4. Step 4: Simplify right side
    146,211.70x = 26,598,810,532.25
  5. Step 5: Solve for x
    x = 26,598,810,532.25/146,211.70
  6. Step 6: Final answer
    x = 181,919.85

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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.