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Finding the Fourth Proportional to 143,786.60, 215,679.90 and 135,038.60

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Solution

The fourth proportional to 143,786.60, 215,679.90 and 135,038.60 is: 202,557.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,786.60 : 215,679.90 = 135,038.60 : x
  2. Step 2: Convert to fraction form
    143,786.60/215,679.90 = 135,038.60/x
  3. Step 3: Cross multiply
    143,786.60x = 215,679.90 × 135,038.60
  4. Step 4: Simplify right side
    143,786.60x = 29,125,111,744.14
  5. Step 5: Solve for x
    x = 29,125,111,744.14/143,786.60
  6. Step 6: Final answer
    x = 202,557.90

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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.