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Finding the Fourth Proportional to 212,460.57, 318,691.64 and 79,339.41

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Solution

The fourth proportional to 212,460.57, 318,691.64 and 79,339.41 is: 119,009.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,460.57 : 318,691.64 = 79,339.41 : x
  2. Step 2: Convert to fraction form
    212,460.57/318,691.64 = 79,339.41/x
  3. Step 3: Cross multiply
    212,460.57x = 318,691.64 × 79,339.41
  4. Step 4: Simplify right side
    212,460.57x = 25,284,806,292.84
  5. Step 5: Solve for x
    x = 25,284,806,292.84/212,460.57
  6. Step 6: Final answer
    x = 119,009.41

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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.