Home / 142,405.38-196,511.22-78,739.02

Finding the Fourth Proportional to 142,405.38, 196,511.22 and 78,739.02

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Solution

The fourth proportional to 142,405.38, 196,511.22 and 78,739.02 is: 108,655.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,405.38 : 196,511.22 = 78,739.02 : x
  2. Step 2: Convert to fraction form
    142,405.38/196,511.22 = 78,739.02/x
  3. Step 3: Cross multiply
    142,405.38x = 196,511.22 × 78,739.02
  4. Step 4: Simplify right side
    142,405.38x = 15,473,100,881.80
  5. Step 5: Solve for x
    x = 15,473,100,881.80/142,405.38
  6. Step 6: Final answer
    x = 108,655.31

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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.