Home / 143,451.40-197,962.93-78,919.25

Finding the Fourth Proportional to 143,451.40, 197,962.93 and 78,919.25

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Solution

The fourth proportional to 143,451.40, 197,962.93 and 78,919.25 is: 108,908.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,451.40 : 197,962.93 = 78,919.25 : x
  2. Step 2: Convert to fraction form
    143,451.40/197,962.93 = 78,919.25/x
  3. Step 3: Cross multiply
    143,451.40x = 197,962.93 × 78,919.25
  4. Step 4: Simplify right side
    143,451.40x = 15,623,086,185.78
  5. Step 5: Solve for x
    x = 15,623,086,185.78/143,451.40
  6. Step 6: Final answer
    x = 108,908.57

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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.