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Finding the Fourth Proportional to 212,476.60, 318,683.31 and 79,340.14

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Solution

The fourth proportional to 212,476.60, 318,683.31 and 79,340.14 is: 118,998.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,476.60 : 318,683.31 = 79,340.14 : x
  2. Step 2: Convert to fraction form
    212,476.60/318,683.31 = 79,340.14/x
  3. Step 3: Cross multiply
    212,476.60x = 318,683.31 × 79,340.14
  4. Step 4: Simplify right side
    212,476.60x = 25,284,378,431.06
  5. Step 5: Solve for x
    x = 25,284,378,431.06/212,476.60
  6. Step 6: Final answer
    x = 118,998.41

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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.