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Finding the Fourth Proportional to 212,366.64, 318,266.91 and 79,112.73

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Solution

The fourth proportional to 212,366.64, 318,266.91 and 79,112.73 is: 118,563.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,366.64 : 318,266.91 = 79,112.73 : x
  2. Step 2: Convert to fraction form
    212,366.64/318,266.91 = 79,112.73/x
  3. Step 3: Cross multiply
    212,366.64x = 318,266.91 × 79,112.73
  4. Step 4: Simplify right side
    212,366.64x = 25,178,964,118.76
  5. Step 5: Solve for x
    x = 25,178,964,118.76/212,366.64
  6. Step 6: Final answer
    x = 118,563.65

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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.