Home / 81,531.28-112,465.38-51,268.60

Finding the Fourth Proportional to 81,531.28, 112,465.38 and 51,268.60

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Solution

The fourth proportional to 81,531.28, 112,465.38 and 51,268.60 is: 70,720.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,531.28 : 112,465.38 = 51,268.60 : x
  2. Step 2: Convert to fraction form
    81,531.28/112,465.38 = 51,268.60/x
  3. Step 3: Cross multiply
    81,531.28x = 112,465.38 × 51,268.60
  4. Step 4: Simplify right side
    81,531.28x = 5,765,942,581.07
  5. Step 5: Solve for x
    x = 5,765,942,581.07/81,531.28
  6. Step 6: Final answer
    x = 70,720.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.