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Finding the Fourth Proportional to 188,555.70, 260,211.32 and 102,519.60

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Solution

The fourth proportional to 188,555.70, 260,211.32 and 102,519.60 is: 141,479.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,555.70 : 260,211.32 = 102,519.60 : x
  2. Step 2: Convert to fraction form
    188,555.70/260,211.32 = 102,519.60/x
  3. Step 3: Cross multiply
    188,555.70x = 260,211.32 × 102,519.60
  4. Step 4: Simplify right side
    188,555.70x = 26,676,760,441.87
  5. Step 5: Solve for x
    x = 26,676,760,441.87/188,555.70
  6. Step 6: Final answer
    x = 141,479.47

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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.