Home / 143,408.31-197,908.28-78,880.28

Finding the Fourth Proportional to 143,408.31, 197,908.28 and 78,880.28

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Solution

The fourth proportional to 143,408.31, 197,908.28 and 78,880.28 is: 108,857.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,408.31 : 197,908.28 = 78,880.28 : x
  2. Step 2: Convert to fraction form
    143,408.31/197,908.28 = 78,880.28/x
  3. Step 3: Cross multiply
    143,408.31x = 197,908.28 × 78,880.28
  4. Step 4: Simplify right side
    143,408.31x = 15,611,059,156.78
  5. Step 5: Solve for x
    x = 15,611,059,156.78/143,408.31
  6. Step 6: Final answer
    x = 108,857.42

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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.