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Finding the Fourth Proportional to 143,859.60, 215,789.04 and 38,678.56

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Solution

The fourth proportional to 143,859.60, 215,789.04 and 38,678.56 is: 58,017.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,859.60 : 215,789.04 = 38,678.56 : x
  2. Step 2: Convert to fraction form
    143,859.60/215,789.04 = 38,678.56/x
  3. Step 3: Cross multiply
    143,859.60x = 215,789.04 × 38,678.56
  4. Step 4: Simplify right side
    143,859.60x = 8,346,409,330.98
  5. Step 5: Solve for x
    x = 8,346,409,330.98/143,859.60
  6. Step 6: Final answer
    x = 58,017.74

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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.