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Finding the Fourth Proportional to 243,155.70, 364,949.55 and 143,190.90

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Solution

The fourth proportional to 243,155.70, 364,949.55 and 143,190.90 is: 214,913.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,155.70 : 364,949.55 = 143,190.90 : x
  2. Step 2: Convert to fraction form
    243,155.70/364,949.55 = 143,190.90/x
  3. Step 3: Cross multiply
    243,155.70x = 364,949.55 × 143,190.90
  4. Step 4: Simplify right side
    243,155.70x = 52,257,454,519.10
  5. Step 5: Solve for x
    x = 52,257,454,519.10/243,155.70
  6. Step 6: Final answer
    x = 214,913.55

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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.