Home / 212,345.73-318,629.94-85,999.41

Finding the Fourth Proportional to 212,345.73, 318,629.94 and 85,999.41

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Solution

The fourth proportional to 212,345.73, 318,629.94 and 85,999.41 is: 129,044.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,345.73 : 318,629.94 = 85,999.41 : x
  2. Step 2: Convert to fraction form
    212,345.73/318,629.94 = 85,999.41/x
  3. Step 3: Cross multiply
    212,345.73x = 318,629.94 × 85,999.41
  4. Step 4: Simplify right side
    212,345.73x = 27,401,986,848.34
  5. Step 5: Solve for x
    x = 27,401,986,848.34/212,345.73
  6. Step 6: Final answer
    x = 129,044.21

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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.