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Finding the Fourth Proportional to 143,652.43, 215,406.54 and 83,700.28

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Solution

The fourth proportional to 143,652.43, 215,406.54 and 83,700.28 is: 125,508.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,652.43 : 215,406.54 = 83,700.28 : x
  2. Step 2: Convert to fraction form
    143,652.43/215,406.54 = 83,700.28/x
  3. Step 3: Cross multiply
    143,652.43x = 215,406.54 × 83,700.28
  4. Step 4: Simplify right side
    143,652.43x = 18,029,586,634.80
  5. Step 5: Solve for x
    x = 18,029,586,634.80/143,652.43
  6. Step 6: Final answer
    x = 125,508.40

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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.