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Finding the Fourth Proportional to 80,009.40, 119,901.42 and 61,216.68

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Solution

The fourth proportional to 80,009.40, 119,901.42 and 61,216.68 is: 91,738.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,009.40 : 119,901.42 = 61,216.68 : x
  2. Step 2: Convert to fraction form
    80,009.40/119,901.42 = 61,216.68/x
  3. Step 3: Cross multiply
    80,009.40x = 119,901.42 × 61,216.68
  4. Step 4: Simplify right side
    80,009.40x = 7,339,966,859.69
  5. Step 5: Solve for x
    x = 7,339,966,859.69/80,009.40
  6. Step 6: Final answer
    x = 91,738.81

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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.