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Finding the Fourth Proportional to 115,816.69, 159,843.73 and 66,748.76

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Solution

The fourth proportional to 115,816.69, 159,843.73 and 66,748.76 is: 92,122.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,816.69 : 159,843.73 = 66,748.76 : x
  2. Step 2: Convert to fraction form
    115,816.69/159,843.73 = 66,748.76/x
  3. Step 3: Cross multiply
    115,816.69x = 159,843.73 × 66,748.76
  4. Step 4: Simplify right side
    115,816.69x = 10,669,370,529.75
  5. Step 5: Solve for x
    x = 10,669,370,529.75/115,816.69
  6. Step 6: Final answer
    x = 92,122.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.