Home / 81,015.48-121,523.40-28,413

Finding the Fourth Proportional to 81,015.48, 121,523.40 and 28,413

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Solution

The fourth proportional to 81,015.48, 121,523.40 and 28,413 is: 42,619.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,015.48 : 121,523.40 = 28,413 : x
  2. Step 2: Convert to fraction form
    81,015.48/121,523.40 = 28,413/x
  3. Step 3: Cross multiply
    81,015.48x = 121,523.40 × 28,413
  4. Step 4: Simplify right side
    81,015.48x = 3,452,844,364.20
  5. Step 5: Solve for x
    x = 3,452,844,364.20/81,015.48
  6. Step 6: Final answer
    x = 42,619.56

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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.