Home / 212,137.74-318,345.11-79,124.40

Finding the Fourth Proportional to 212,137.74, 318,345.11 and 79,124.40

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Solution

The fourth proportional to 212,137.74, 318,345.11 and 79,124.40 is: 118,738.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,137.74 : 318,345.11 = 79,124.40 : x
  2. Step 2: Convert to fraction form
    212,137.74/318,345.11 = 79,124.40/x
  3. Step 3: Cross multiply
    212,137.74x = 318,345.11 × 79,124.40
  4. Step 4: Simplify right side
    212,137.74x = 25,188,864,229.96
  5. Step 5: Solve for x
    x = 25,188,864,229.96/212,137.74
  6. Step 6: Final answer
    x = 118,738.25

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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.