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Finding the Fourth Proportional to 188,129.79, 259,621.20 and 103,245.03

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Solution

The fourth proportional to 188,129.79, 259,621.20 and 103,245.03 is: 142,479.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,129.79 : 259,621.20 = 103,245.03 : x
  2. Step 2: Convert to fraction form
    188,129.79/259,621.20 = 103,245.03/x
  3. Step 3: Cross multiply
    188,129.79x = 259,621.20 × 103,245.03
  4. Step 4: Simplify right side
    188,129.79x = 26,804,598,582.64
  5. Step 5: Solve for x
    x = 26,804,598,582.64/188,129.79
  6. Step 6: Final answer
    x = 142,479.29

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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.