Home / 142,155.14-196,172.82-78,491.56

Finding the Fourth Proportional to 142,155.14, 196,172.82 and 78,491.56

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Solution

The fourth proportional to 142,155.14, 196,172.82 and 78,491.56 is: 108,317.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,155.14 : 196,172.82 = 78,491.56 : x
  2. Step 2: Convert to fraction form
    142,155.14/196,172.82 = 78,491.56/x
  3. Step 3: Cross multiply
    142,155.14x = 196,172.82 × 78,491.56
  4. Step 4: Simplify right side
    142,155.14x = 15,397,910,671.40
  5. Step 5: Solve for x
    x = 15,397,910,671.40/142,155.14
  6. Step 6: Final answer
    x = 108,317.65

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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.