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Finding the Fourth Proportional to 143,167.60, 214,731.79 and 79,243.98

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Solution

The fourth proportional to 143,167.60, 214,731.79 and 79,243.98 is: 118,855.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,167.60 : 214,731.79 = 79,243.98 : x
  2. Step 2: Convert to fraction form
    143,167.60/214,731.79 = 79,243.98/x
  3. Step 3: Cross multiply
    143,167.60x = 214,731.79 × 79,243.98
  4. Step 4: Simplify right side
    143,167.60x = 17,016,201,474.01
  5. Step 5: Solve for x
    x = 17,016,201,474.01/143,167.60
  6. Step 6: Final answer
    x = 118,855.11

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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.