Home / 143,742.72-215,652.96-81,456.96

Finding the Fourth Proportional to 143,742.72, 215,652.96 and 81,456.96

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Solution

The fourth proportional to 143,742.72, 215,652.96 and 81,456.96 is: 122,207.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,742.72 : 215,652.96 = 81,456.96 : x
  2. Step 2: Convert to fraction form
    143,742.72/215,652.96 = 81,456.96/x
  3. Step 3: Cross multiply
    143,742.72x = 215,652.96 × 81,456.96
  4. Step 4: Simplify right side
    143,742.72x = 17,566,434,536.60
  5. Step 5: Solve for x
    x = 17,566,434,536.60/143,742.72
  6. Step 6: Final answer
    x = 122,207.47

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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.