Home / 81,252.01-121,878.39-21,280.36

Finding the Fourth Proportional to 81,252.01, 121,878.39 and 21,280.36

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Solution

The fourth proportional to 81,252.01, 121,878.39 and 21,280.36 is: 31,920.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,252.01 : 121,878.39 = 21,280.36 : x
  2. Step 2: Convert to fraction form
    81,252.01/121,878.39 = 21,280.36/x
  3. Step 3: Cross multiply
    81,252.01x = 121,878.39 × 21,280.36
  4. Step 4: Simplify right side
    81,252.01x = 2,593,615,406.03
  5. Step 5: Solve for x
    x = 2,593,615,406.03/81,252.01
  6. Step 6: Final answer
    x = 31,920.63

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1.5x scale

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.