Home / 142,478.26-196,619.18-78,814.68

Finding the Fourth Proportional to 142,478.26, 196,619.18 and 78,814.68

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Solution

The fourth proportional to 142,478.26, 196,619.18 and 78,814.68 is: 108,763.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,478.26 : 196,619.18 = 78,814.68 : x
  2. Step 2: Convert to fraction form
    142,478.26/196,619.18 = 78,814.68/x
  3. Step 3: Cross multiply
    142,478.26x = 196,619.18 × 78,814.68
  4. Step 4: Simplify right side
    142,478.26x = 15,496,477,753.56
  5. Step 5: Solve for x
    x = 15,496,477,753.56/142,478.26
  6. Step 6: Final answer
    x = 108,763.81

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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.