Home / 142,100.73-196,087.64-78,429.87

Finding the Fourth Proportional to 142,100.73, 196,087.64 and 78,429.87

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Solution

The fourth proportional to 142,100.73, 196,087.64 and 78,429.87 is: 108,226.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,100.73 : 196,087.64 = 78,429.87 : x
  2. Step 2: Convert to fraction form
    142,100.73/196,087.64 = 78,429.87/x
  3. Step 3: Cross multiply
    142,100.73x = 196,087.64 × 78,429.87
  4. Step 4: Simplify right side
    142,100.73x = 15,379,127,721.66
  5. Step 5: Solve for x
    x = 15,379,127,721.66/142,100.73
  6. Step 6: Final answer
    x = 108,226.94

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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.