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Finding the Fourth Proportional to 212,630.68, 318,835.32 and 79,401.38

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Solution

The fourth proportional to 212,630.68, 318,835.32 and 79,401.38 is: 119,060.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,630.68 : 318,835.32 = 79,401.38 : x
  2. Step 2: Convert to fraction form
    212,630.68/318,835.32 = 79,401.38/x
  3. Step 3: Cross multiply
    212,630.68x = 318,835.32 × 79,401.38
  4. Step 4: Simplify right side
    212,630.68x = 25,315,964,400.74
  5. Step 5: Solve for x
    x = 25,315,964,400.74/212,630.68
  6. Step 6: Final answer
    x = 119,060.73

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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.