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Finding the Fourth Proportional to 212,608.23, 318,919.64 and 112,633.17

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Solution

The fourth proportional to 212,608.23, 318,919.64 and 112,633.17 is: 168,953.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,608.23 : 318,919.64 = 112,633.17 : x
  2. Step 2: Convert to fraction form
    212,608.23/318,919.64 = 112,633.17/x
  3. Step 3: Cross multiply
    212,608.23x = 318,919.64 × 112,633.17
  4. Step 4: Simplify right side
    212,608.23x = 35,920,930,028.46
  5. Step 5: Solve for x
    x = 35,920,930,028.46/212,608.23
  6. Step 6: Final answer
    x = 168,953.62

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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.