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Finding the Fourth Proportional to 212,658.22, 318,976.71 and 79,528.69

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Solution

The fourth proportional to 212,658.22, 318,976.71 and 79,528.69 is: 119,289.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,658.22 : 318,976.71 = 79,528.69 : x
  2. Step 2: Convert to fraction form
    212,658.22/318,976.71 = 79,528.69/x
  3. Step 3: Cross multiply
    212,658.22x = 318,976.71 × 79,528.69
  4. Step 4: Simplify right side
    212,658.22x = 25,367,799,886.81
  5. Step 5: Solve for x
    x = 25,367,799,886.81/212,658.22
  6. Step 6: Final answer
    x = 119,289.06

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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.