Home / 142,327.28-196,421.82-78,663.70

Finding the Fourth Proportional to 142,327.28, 196,421.82 and 78,663.70

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Solution

The fourth proportional to 142,327.28, 196,421.82 and 78,663.70 is: 108,561.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,327.28 : 196,421.82 = 78,663.70 : x
  2. Step 2: Convert to fraction form
    142,327.28/196,421.82 = 78,663.70/x
  3. Step 3: Cross multiply
    142,327.28x = 196,421.82 × 78,663.70
  4. Step 4: Simplify right side
    142,327.28x = 15,451,267,121.93
  5. Step 5: Solve for x
    x = 15,451,267,121.93/142,327.28
  6. Step 6: Final answer
    x = 108,561.53

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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.