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Finding the Fourth Proportional to 212,576.40, 318,674.88 and 79,354.08

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Solution

The fourth proportional to 212,576.40, 318,674.88 and 79,354.08 is: 118,960.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,576.40 : 318,674.88 = 79,354.08 : x
  2. Step 2: Convert to fraction form
    212,576.40/318,674.88 = 79,354.08/x
  3. Step 3: Cross multiply
    212,576.40x = 318,674.88 × 79,354.08
  4. Step 4: Simplify right side
    212,576.40x = 25,288,151,921.51
  5. Step 5: Solve for x
    x = 25,288,151,921.51/212,576.40
  6. Step 6: Final answer
    x = 118,960.30

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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.