Home / 135,280.36-186,644.58-81,581.80

Finding the Fourth Proportional to 135,280.36, 186,644.58 and 81,581.80

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Solution

The fourth proportional to 135,280.36, 186,644.58 and 81,581.80 is: 112,557.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,280.36 : 186,644.58 = 81,581.80 : x
  2. Step 2: Convert to fraction form
    135,280.36/186,644.58 = 81,581.80/x
  3. Step 3: Cross multiply
    135,280.36x = 186,644.58 × 81,581.80
  4. Step 4: Simplify right side
    135,280.36x = 15,226,800,796.64
  5. Step 5: Solve for x
    x = 15,226,800,796.64/135,280.36
  6. Step 6: Final answer
    x = 112,557.36

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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.