Home / 142,643.58-196,851-78,983.64

Finding the Fourth Proportional to 142,643.58, 196,851 and 78,983.64

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Solution

The fourth proportional to 142,643.58, 196,851 and 78,983.64 is: 108,999.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,643.58 : 196,851 = 78,983.64 : x
  2. Step 2: Convert to fraction form
    142,643.58/196,851 = 78,983.64/x
  3. Step 3: Cross multiply
    142,643.58x = 196,851 × 78,983.64
  4. Step 4: Simplify right side
    142,643.58x = 15,548,008,517.64
  5. Step 5: Solve for x
    x = 15,548,008,517.64/142,643.58
  6. Step 6: Final answer
    x = 108,999.01

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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.