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Finding the Fourth Proportional to 143,419.64, 215,056.01 and 84,273.08

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Solution

The fourth proportional to 143,419.64, 215,056.01 and 84,273.08 is: 126,366.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,419.64 : 215,056.01 = 84,273.08 : x
  2. Step 2: Convert to fraction form
    143,419.64/215,056.01 = 84,273.08/x
  3. Step 3: Cross multiply
    143,419.64x = 215,056.01 × 84,273.08
  4. Step 4: Simplify right side
    143,419.64x = 18,123,431,470.61
  5. Step 5: Solve for x
    x = 18,123,431,470.61/143,419.64
  6. Step 6: Final answer
    x = 126,366.46

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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.