Home / 142,153.76-196,172.48-78,491.68

Finding the Fourth Proportional to 142,153.76, 196,172.48 and 78,491.68

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Solution

The fourth proportional to 142,153.76, 196,172.48 and 78,491.68 is: 108,318.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,153.76 : 196,172.48 = 78,491.68 : x
  2. Step 2: Convert to fraction form
    142,153.76/196,172.48 = 78,491.68/x
  3. Step 3: Cross multiply
    142,153.76x = 196,172.48 × 78,491.68
  4. Step 4: Simplify right side
    142,153.76x = 15,397,907,524.97
  5. Step 5: Solve for x
    x = 15,397,907,524.97/142,153.76
  6. Step 6: Final answer
    x = 108,318.68

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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.