Home / 81,207.95-121,516.65-67,036.19

Finding the Fourth Proportional to 81,207.95, 121,516.65 and 67,036.19

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Solution

The fourth proportional to 81,207.95, 121,516.65 and 67,036.19 is: 100,310.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,207.95 : 121,516.65 = 67,036.19 : x
  2. Step 2: Convert to fraction form
    81,207.95/121,516.65 = 67,036.19/x
  3. Step 3: Cross multiply
    81,207.95x = 121,516.65 × 67,036.19
  4. Step 4: Simplify right side
    81,207.95x = 8,146,012,629.98
  5. Step 5: Solve for x
    x = 8,146,012,629.98/81,207.95
  6. Step 6: Final answer
    x = 100,310.54

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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.