Home / 81,216.27-121,792.14-31,268.70

Finding the Fourth Proportional to 81,216.27, 121,792.14 and 31,268.70

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Solution

The fourth proportional to 81,216.27, 121,792.14 and 31,268.70 is: 46,890.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,216.27 : 121,792.14 = 31,268.70 : x
  2. Step 2: Convert to fraction form
    81,216.27/121,792.14 = 31,268.70/x
  3. Step 3: Cross multiply
    81,216.27x = 121,792.14 × 31,268.70
  4. Step 4: Simplify right side
    81,216.27x = 3,808,281,888.02
  5. Step 5: Solve for x
    x = 3,808,281,888.02/81,216.27
  6. Step 6: Final answer
    x = 46,890.63

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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.