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Finding the Fourth Proportional to 143,896.60, 216,039.30 and 91,408.60

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Solution

The fourth proportional to 143,896.60, 216,039.30 and 91,408.60 is: 137,236.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,896.60 : 216,039.30 = 91,408.60 : x
  2. Step 2: Convert to fraction form
    143,896.60/216,039.30 = 91,408.60/x
  3. Step 3: Cross multiply
    143,896.60x = 216,039.30 × 91,408.60
  4. Step 4: Simplify right side
    143,896.60x = 19,747,849,957.98
  5. Step 5: Solve for x
    x = 19,747,849,957.98/143,896.60
  6. Step 6: Final answer
    x = 137,236.39

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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.