Home / 142,136.32-196,146.91-78,472.75

Finding the Fourth Proportional to 142,136.32, 196,146.91 and 78,472.75

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Solution

The fourth proportional to 142,136.32, 196,146.91 and 78,472.75 is: 108,291.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,136.32 : 196,146.91 = 78,472.75 : x
  2. Step 2: Convert to fraction form
    142,136.32/196,146.91 = 78,472.75/x
  3. Step 3: Cross multiply
    142,136.32x = 196,146.91 × 78,472.75
  4. Step 4: Simplify right side
    142,136.32x = 15,392,187,431.70
  5. Step 5: Solve for x
    x = 15,392,187,431.70/142,136.32
  6. Step 6: Final answer
    x = 108,291.73

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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.