Home / 142,110.66-196,112.75-78,448.50

Finding the Fourth Proportional to 142,110.66, 196,112.75 and 78,448.50

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Solution

The fourth proportional to 142,110.66, 196,112.75 and 78,448.50 is: 108,258.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,110.66 : 196,112.75 = 78,448.50 : x
  2. Step 2: Convert to fraction form
    142,110.66/196,112.75 = 78,448.50/x
  3. Step 3: Cross multiply
    142,110.66x = 196,112.75 × 78,448.50
  4. Step 4: Simplify right side
    142,110.66x = 15,384,750,676.13
  5. Step 5: Solve for x
    x = 15,384,750,676.13/142,110.66
  6. Step 6: Final answer
    x = 108,258.95

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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.