Home / 81,268.40-121,858.76-36,870.93

Finding the Fourth Proportional to 81,268.40, 121,858.76 and 36,870.93

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Solution

The fourth proportional to 81,268.40, 121,858.76 and 36,870.93 is: 55,286.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,268.40 : 121,858.76 = 36,870.93 : x
  2. Step 2: Convert to fraction form
    81,268.40/121,858.76 = 36,870.93/x
  3. Step 3: Cross multiply
    81,268.40x = 121,858.76 × 36,870.93
  4. Step 4: Simplify right side
    81,268.40x = 4,493,045,809.85
  5. Step 5: Solve for x
    x = 4,493,045,809.85/81,268.40
  6. Step 6: Final answer
    x = 55,286.51

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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.