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Finding the Fourth Proportional to 188,220.72, 259,732.80 and 103,330.56

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Solution

The fourth proportional to 188,220.72, 259,732.80 and 103,330.56 is: 142,589.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,220.72 : 259,732.80 = 103,330.56 : x
  2. Step 2: Convert to fraction form
    188,220.72/259,732.80 = 103,330.56/x
  3. Step 3: Cross multiply
    188,220.72x = 259,732.80 × 103,330.56
  4. Step 4: Simplify right side
    188,220.72x = 26,838,335,674.37
  5. Step 5: Solve for x
    x = 26,838,335,674.37/188,220.72
  6. Step 6: Final answer
    x = 142,589.70

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1.5x scale

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.