Home / 143,072.12-197,438.10-79,408.28

Finding the Fourth Proportional to 143,072.12, 197,438.10 and 79,408.28

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Solution

The fourth proportional to 143,072.12, 197,438.10 and 79,408.28 is: 109,582.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,072.12 : 197,438.10 = 79,408.28 : x
  2. Step 2: Convert to fraction form
    143,072.12/197,438.10 = 79,408.28/x
  3. Step 3: Cross multiply
    143,072.12x = 197,438.10 × 79,408.28
  4. Step 4: Simplify right side
    143,072.12x = 15,678,219,927.47
  5. Step 5: Solve for x
    x = 15,678,219,927.47/143,072.12
  6. Step 6: Final answer
    x = 109,582.64

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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.