Home / 142,439.14-196,548.96-78,768.28

Finding the Fourth Proportional to 142,439.14, 196,548.96 and 78,768.28

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Solution

The fourth proportional to 142,439.14, 196,548.96 and 78,768.28 is: 108,690.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,439.14 : 196,548.96 = 78,768.28 : x
  2. Step 2: Convert to fraction form
    142,439.14/196,548.96 = 78,768.28/x
  3. Step 3: Cross multiply
    142,439.14x = 196,548.96 × 78,768.28
  4. Step 4: Simplify right side
    142,439.14x = 15,481,823,514.99
  5. Step 5: Solve for x
    x = 15,481,823,514.99/142,439.14
  6. Step 6: Final answer
    x = 108,690.80

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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.