Home / 142,920.76-197,221.62-79,258.60

Finding the Fourth Proportional to 142,920.76, 197,221.62 and 79,258.60

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Solution

The fourth proportional to 142,920.76, 197,221.62 and 79,258.60 is: 109,371.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,920.76 : 197,221.62 = 79,258.60 : x
  2. Step 2: Convert to fraction form
    142,920.76/197,221.62 = 79,258.60/x
  3. Step 3: Cross multiply
    142,920.76x = 197,221.62 × 79,258.60
  4. Step 4: Simplify right side
    142,920.76x = 15,631,509,490.93
  5. Step 5: Solve for x
    x = 15,631,509,490.93/142,920.76
  6. Step 6: Final answer
    x = 109,371.86

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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.