Home / 142,538.28-196,706.90-78,882

Finding the Fourth Proportional to 142,538.28, 196,706.90 and 78,882

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Solution

The fourth proportional to 142,538.28, 196,706.90 and 78,882 is: 108,859.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,538.28 : 196,706.90 = 78,882 : x
  2. Step 2: Convert to fraction form
    142,538.28/196,706.90 = 78,882/x
  3. Step 3: Cross multiply
    142,538.28x = 196,706.90 × 78,882
  4. Step 4: Simplify right side
    142,538.28x = 15,516,633,685.80
  5. Step 5: Solve for x
    x = 15,516,633,685.80/142,538.28
  6. Step 6: Final answer
    x = 108,859.41

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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.