Home / 212,289.30-318,438.81-54,519.12

Finding the Fourth Proportional to 212,289.30, 318,438.81 and 54,519.12

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Solution

The fourth proportional to 212,289.30, 318,438.81 and 54,519.12 is: 81,779.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,289.30 : 318,438.81 = 54,519.12 : x
  2. Step 2: Convert to fraction form
    212,289.30/318,438.81 = 54,519.12/x
  3. Step 3: Cross multiply
    212,289.30x = 318,438.81 × 54,519.12
  4. Step 4: Simplify right side
    212,289.30x = 17,361,003,695.05
  5. Step 5: Solve for x
    x = 17,361,003,695.05/212,289.30
  6. Step 6: Final answer
    x = 81,779.93

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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.