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Finding the Fourth Proportional to 212,352.68, 318,306.90 and 79,175

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Solution

The fourth proportional to 212,352.68, 318,306.90 and 79,175 is: 118,679.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,352.68 : 318,306.90 = 79,175 : x
  2. Step 2: Convert to fraction form
    212,352.68/318,306.90 = 79,175/x
  3. Step 3: Cross multiply
    212,352.68x = 318,306.90 × 79,175
  4. Step 4: Simplify right side
    212,352.68x = 25,201,948,807.50
  5. Step 5: Solve for x
    x = 25,201,948,807.50/212,352.68
  6. Step 6: Final answer
    x = 118,679.68

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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.