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Finding the Fourth Proportional to 212,643.34, 318,906.68 and 79,479.34

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Solution

The fourth proportional to 212,643.34, 318,906.68 and 79,479.34 is: 119,197.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,643.34 : 318,906.68 = 79,479.34 : x
  2. Step 2: Convert to fraction form
    212,643.34/318,906.68 = 79,479.34/x
  3. Step 3: Cross multiply
    212,643.34x = 318,906.68 × 79,479.34
  4. Step 4: Simplify right side
    212,643.34x = 25,346,492,447.99
  5. Step 5: Solve for x
    x = 25,346,492,447.99/212,643.34
  6. Step 6: Final answer
    x = 119,197.21

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1.5x scale

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.