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Finding the Fourth Proportional to 143,438.89, 214,961.49 and 90,754.06

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Solution

The fourth proportional to 143,438.89, 214,961.49 and 90,754.06 is: 136,006.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,438.89 : 214,961.49 = 90,754.06 : x
  2. Step 2: Convert to fraction form
    143,438.89/214,961.49 = 90,754.06/x
  3. Step 3: Cross multiply
    143,438.89x = 214,961.49 × 90,754.06
  4. Step 4: Simplify right side
    143,438.89x = 19,508,626,886.34
  5. Step 5: Solve for x
    x = 19,508,626,886.34/143,438.89
  6. Step 6: Final answer
    x = 136,006.54

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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.