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Finding the Fourth Proportional to 143,836.49, 215,754.53 and 38,655.47

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Solution

The fourth proportional to 143,836.49, 215,754.53 and 38,655.47 is: 57,983.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,836.49 : 215,754.53 = 38,655.47 : x
  2. Step 2: Convert to fraction form
    143,836.49/215,754.53 = 38,655.47/x
  3. Step 3: Cross multiply
    143,836.49x = 215,754.53 × 38,655.47
  4. Step 4: Simplify right side
    143,836.49x = 8,340,091,489.73
  5. Step 5: Solve for x
    x = 8,340,091,489.73/143,836.49
  6. Step 6: Final answer
    x = 57,983.14

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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.