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Finding the Fourth Proportional to 143,996.40, 215,897.40 and 76,539.60

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Solution

The fourth proportional to 143,996.40, 215,897.40 and 76,539.60 is: 114,757.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,996.40 : 215,897.40 = 76,539.60 : x
  2. Step 2: Convert to fraction form
    143,996.40/215,897.40 = 76,539.60/x
  3. Step 3: Cross multiply
    143,996.40x = 215,897.40 × 76,539.60
  4. Step 4: Simplify right side
    143,996.40x = 16,524,700,637.04
  5. Step 5: Solve for x
    x = 16,524,700,637.04/143,996.40
  6. Step 6: Final answer
    x = 114,757.73

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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.