Home / 142,890.80-197,198.01-79,228.58

Finding the Fourth Proportional to 142,890.80, 197,198.01 and 79,228.58

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Solution

The fourth proportional to 142,890.80, 197,198.01 and 79,228.58 is: 109,340.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,890.80 : 197,198.01 = 79,228.58 : x
  2. Step 2: Convert to fraction form
    142,890.80/197,198.01 = 79,228.58/x
  3. Step 3: Cross multiply
    142,890.80x = 197,198.01 × 79,228.58
  4. Step 4: Simplify right side
    142,890.80x = 15,623,717,325.14
  5. Step 5: Solve for x
    x = 15,623,717,325.14/142,890.80
  6. Step 6: Final answer
    x = 109,340.26

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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.