Home / 142,828.97-197,098.31-78,296.81

Finding the Fourth Proportional to 142,828.97, 197,098.31 and 78,296.81

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Solution

The fourth proportional to 142,828.97, 197,098.31 and 78,296.81 is: 108,046.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,828.97 : 197,098.31 = 78,296.81 : x
  2. Step 2: Convert to fraction form
    142,828.97/197,098.31 = 78,296.81/x
  3. Step 3: Cross multiply
    142,828.97x = 197,098.31 × 78,296.81
  4. Step 4: Simplify right side
    142,828.97x = 15,432,168,139.64
  5. Step 5: Solve for x
    x = 15,432,168,139.64/142,828.97
  6. Step 6: Final answer
    x = 108,046.49

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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.