Home / 142,390.97-196,503.47-78,731.04

Finding the Fourth Proportional to 142,390.97, 196,503.47 and 78,731.04

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Solution

The fourth proportional to 142,390.97, 196,503.47 and 78,731.04 is: 108,651.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,390.97 : 196,503.47 = 78,731.04 : x
  2. Step 2: Convert to fraction form
    142,390.97/196,503.47 = 78,731.04/x
  3. Step 3: Cross multiply
    142,390.97x = 196,503.47 × 78,731.04
  4. Step 4: Simplify right side
    142,390.97x = 15,470,922,163.05
  5. Step 5: Solve for x
    x = 15,470,922,163.05/142,390.97
  6. Step 6: Final answer
    x = 108,651.01

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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.