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Finding the Fourth Proportional to 212,357.93, 318,314.78 and 79,180.25

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Solution

The fourth proportional to 212,357.93, 318,314.78 and 79,180.25 is: 118,687.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,357.93 : 318,314.78 = 79,180.25 : x
  2. Step 2: Convert to fraction form
    212,357.93/318,314.78 = 79,180.25/x
  3. Step 3: Cross multiply
    212,357.93x = 318,314.78 × 79,180.25
  4. Step 4: Simplify right side
    212,357.93x = 25,204,243,463.19
  5. Step 5: Solve for x
    x = 25,204,243,463.19/212,357.93
  6. Step 6: Final answer
    x = 118,687.55

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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.