Home / 212,469.12-318,506.82-72,129.36

Finding the Fourth Proportional to 212,469.12, 318,506.82 and 72,129.36

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Solution

The fourth proportional to 212,469.12, 318,506.82 and 72,129.36 is: 108,127.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,469.12 : 318,506.82 = 72,129.36 : x
  2. Step 2: Convert to fraction form
    212,469.12/318,506.82 = 72,129.36/x
  3. Step 3: Cross multiply
    212,469.12x = 318,506.82 × 72,129.36
  4. Step 4: Simplify right side
    212,469.12x = 22,973,693,082.24
  5. Step 5: Solve for x
    x = 22,973,693,082.24/212,469.12
  6. Step 6: Final answer
    x = 108,127.21

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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.