Home / 142,920.73-196,781.56-121,365.28

Finding the Fourth Proportional to 142,920.73, 196,781.56 and 121,365.28

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Solution

The fourth proportional to 142,920.73, 196,781.56 and 121,365.28 is: 167,102.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,920.73 : 196,781.56 = 121,365.28 : x
  2. Step 2: Convert to fraction form
    142,920.73/196,781.56 = 121,365.28/x
  3. Step 3: Cross multiply
    142,920.73x = 196,781.56 × 121,365.28
  4. Step 4: Simplify right side
    142,920.73x = 23,882,449,128.24
  5. Step 5: Solve for x
    x = 23,882,449,128.24/142,920.73
  6. Step 6: Final answer
    x = 167,102.76

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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.