Home / 142,772.71-197,026.57-78,231.69

Finding the Fourth Proportional to 142,772.71, 197,026.57 and 78,231.69

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Solution

The fourth proportional to 142,772.71, 197,026.57 and 78,231.69 is: 107,959.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,772.71 : 197,026.57 = 78,231.69 : x
  2. Step 2: Convert to fraction form
    142,772.71/197,026.57 = 78,231.69/x
  3. Step 3: Cross multiply
    142,772.71x = 197,026.57 × 78,231.69
  4. Step 4: Simplify right side
    142,772.71x = 15,413,721,546.00
  5. Step 5: Solve for x
    x = 15,413,721,546.00/142,772.71
  6. Step 6: Final answer
    x = 107,959.86

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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.