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Finding the Fourth Proportional to 79,648.30, 119,488.79 and 66,591.91

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Solution

The fourth proportional to 79,648.30, 119,488.79 and 66,591.91 is: 99,901.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,648.30 : 119,488.79 = 66,591.91 : x
  2. Step 2: Convert to fraction form
    79,648.30/119,488.79 = 66,591.91/x
  3. Step 3: Cross multiply
    79,648.30x = 119,488.79 × 66,591.91
  4. Step 4: Simplify right side
    79,648.30x = 7,956,986,749.69
  5. Step 5: Solve for x
    x = 7,956,986,749.69/79,648.30
  6. Step 6: Final answer
    x = 99,901.53

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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.