Home / 212,388.72-318,404.52-142,053.36

Finding the Fourth Proportional to 212,388.72, 318,404.52 and 142,053.36

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Solution

The fourth proportional to 212,388.72, 318,404.52 and 142,053.36 is: 212,960.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,388.72 : 318,404.52 = 142,053.36 : x
  2. Step 2: Convert to fraction form
    212,388.72/318,404.52 = 142,053.36/x
  3. Step 3: Cross multiply
    212,388.72x = 318,404.52 × 142,053.36
  4. Step 4: Simplify right side
    212,388.72x = 45,230,431,905.19
  5. Step 5: Solve for x
    x = 45,230,431,905.19/212,388.72
  6. Step 6: Final answer
    x = 212,960.61

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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.