Home / 81,328.95-121,930.92-41,315.04

Finding the Fourth Proportional to 81,328.95, 121,930.92 and 41,315.04

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Solution

The fourth proportional to 81,328.95, 121,930.92 and 41,315.04 is: 61,940.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,328.95 : 121,930.92 = 41,315.04 : x
  2. Step 2: Convert to fraction form
    81,328.95/121,930.92 = 41,315.04/x
  3. Step 3: Cross multiply
    81,328.95x = 121,930.92 × 41,315.04
  4. Step 4: Simplify right side
    81,328.95x = 5,037,580,837.04
  5. Step 5: Solve for x
    x = 5,037,580,837.04/81,328.95
  6. Step 6: Final answer
    x = 61,940.81

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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.