Home / 212,650.53-318,965.20-79,521

Finding the Fourth Proportional to 212,650.53, 318,965.20 and 79,521

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Solution

The fourth proportional to 212,650.53, 318,965.20 and 79,521 is: 119,277.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,650.53 : 318,965.20 = 79,521 : x
  2. Step 2: Convert to fraction form
    212,650.53/318,965.20 = 79,521/x
  3. Step 3: Cross multiply
    212,650.53x = 318,965.20 × 79,521
  4. Step 4: Simplify right side
    212,650.53x = 25,364,431,669.20
  5. Step 5: Solve for x
    x = 25,364,431,669.20/212,650.53
  6. Step 6: Final answer
    x = 119,277.54

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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.