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Finding the Fourth Proportional to 143,459.87, 214,964.85 and 90,758.03

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Solution

The fourth proportional to 143,459.87, 214,964.85 and 90,758.03 is: 135,994.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,459.87 : 214,964.85 = 90,758.03 : x
  2. Step 2: Convert to fraction form
    143,459.87/214,964.85 = 90,758.03/x
  3. Step 3: Cross multiply
    143,459.87x = 214,964.85 × 90,758.03
  4. Step 4: Simplify right side
    143,459.87x = 19,509,786,305.25
  5. Step 5: Solve for x
    x = 19,509,786,305.25/143,459.87
  6. Step 6: Final answer
    x = 135,994.73

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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.