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Finding the Fourth Proportional to 143,990.86, 215,971.71 and 38,820.46

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Solution

The fourth proportional to 143,990.86, 215,971.71 and 38,820.46 is: 58,226.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,990.86 : 215,971.71 = 38,820.46 : x
  2. Step 2: Convert to fraction form
    143,990.86/215,971.71 = 38,820.46/x
  3. Step 3: Cross multiply
    143,990.86x = 215,971.71 × 38,820.46
  4. Step 4: Simplify right side
    143,990.86x = 8,384,121,129.19
  5. Step 5: Solve for x
    x = 8,384,121,129.19/143,990.86
  6. Step 6: Final answer
    x = 58,226.76

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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.