Home / 142,324.96-196,408.48-78,662.76

Finding the Fourth Proportional to 142,324.96, 196,408.48 and 78,662.76

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Solution

The fourth proportional to 142,324.96, 196,408.48 and 78,662.76 is: 108,554.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,324.96 : 196,408.48 = 78,662.76 : x
  2. Step 2: Convert to fraction form
    142,324.96/196,408.48 = 78,662.76/x
  3. Step 3: Cross multiply
    142,324.96x = 196,408.48 × 78,662.76
  4. Step 4: Simplify right side
    142,324.96x = 15,450,033,124.20
  5. Step 5: Solve for x
    x = 15,450,033,124.20/142,324.96
  6. Step 6: Final answer
    x = 108,554.63

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Half scale
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Double scale
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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.