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Finding the Fourth Proportional to 212,653.34, 318,969.41 and 79,523.81

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Solution

The fourth proportional to 212,653.34, 318,969.41 and 79,523.81 is: 119,281.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,653.34 : 318,969.41 = 79,523.81 : x
  2. Step 2: Convert to fraction form
    212,653.34/318,969.41 = 79,523.81/x
  3. Step 3: Cross multiply
    212,653.34x = 318,969.41 × 79,523.81
  4. Step 4: Simplify right side
    212,653.34x = 25,365,662,756.65
  5. Step 5: Solve for x
    x = 25,365,662,756.65/212,653.34
  6. Step 6: Final answer
    x = 119,281.75

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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.