Home / 131,665.72-197,548.08-78,388.44

Finding the Fourth Proportional to 131,665.72, 197,548.08 and 78,388.44

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Solution

The fourth proportional to 131,665.72, 197,548.08 and 78,388.44 is: 117,612.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,665.72 : 197,548.08 = 78,388.44 : x
  2. Step 2: Convert to fraction form
    131,665.72/197,548.08 = 78,388.44/x
  3. Step 3: Cross multiply
    131,665.72x = 197,548.08 × 78,388.44
  4. Step 4: Simplify right side
    131,665.72x = 15,485,485,816.20
  5. Step 5: Solve for x
    x = 15,485,485,816.20/131,665.72
  6. Step 6: Final answer
    x = 117,612.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.