Home / 129,268.56-178,388.24-71,907.60

Finding the Fourth Proportional to 129,268.56, 178,388.24 and 71,907.60

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Solution

The fourth proportional to 129,268.56, 178,388.24 and 71,907.60 is: 99,231.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,268.56 : 178,388.24 = 71,907.60 : x
  2. Step 2: Convert to fraction form
    129,268.56/178,388.24 = 71,907.60/x
  3. Step 3: Cross multiply
    129,268.56x = 178,388.24 × 71,907.60
  4. Step 4: Simplify right side
    129,268.56x = 12,827,470,206.62
  5. Step 5: Solve for x
    x = 12,827,470,206.62/129,268.56
  6. Step 6: Final answer
    x = 99,231.17

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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.