Home / 212,651.78-318,967.07-79,522.25

Finding the Fourth Proportional to 212,651.78, 318,967.07 and 79,522.25

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Solution

The fourth proportional to 212,651.78, 318,967.07 and 79,522.25 is: 119,279.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,651.78 : 318,967.07 = 79,522.25 : x
  2. Step 2: Convert to fraction form
    212,651.78/318,967.07 = 79,522.25/x
  3. Step 3: Cross multiply
    212,651.78x = 318,967.07 × 79,522.25
  4. Step 4: Simplify right side
    212,651.78x = 25,364,977,089.86
  5. Step 5: Solve for x
    x = 25,364,977,089.86/212,651.78
  6. Step 6: Final answer
    x = 119,279.40

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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.