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Finding the Fourth Proportional to 142,710.99, 196,947.65 and 79,048.78

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Solution

The fourth proportional to 142,710.99, 196,947.65 and 79,048.78 is: 109,090.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,710.99 : 196,947.65 = 79,048.78 : x
  2. Step 2: Convert to fraction form
    142,710.99/196,947.65 = 79,048.78/x
  3. Step 3: Cross multiply
    142,710.99x = 196,947.65 × 79,048.78
  4. Step 4: Simplify right side
    142,710.99x = 15,568,471,456.37
  5. Step 5: Solve for x
    x = 15,568,471,456.37/142,710.99
  6. Step 6: Final answer
    x = 109,090.91

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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.