Home / 213,278.08-320,111-113,521.72

Finding the Fourth Proportional to 213,278.08, 320,111 and 113,521.72

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Solution

The fourth proportional to 213,278.08, 320,111 and 113,521.72 is: 170,385.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,278.08 : 320,111 = 113,521.72 : x
  2. Step 2: Convert to fraction form
    213,278.08/320,111 = 113,521.72/x
  3. Step 3: Cross multiply
    213,278.08x = 320,111 × 113,521.72
  4. Step 4: Simplify right side
    213,278.08x = 36,339,551,310.92
  5. Step 5: Solve for x
    x = 36,339,551,310.92/213,278.08
  6. Step 6: Final answer
    x = 170,385.78

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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.