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Finding the Fourth Proportional to 188,428.88, 260,031.06 and 107,856

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Solution

The fourth proportional to 188,428.88, 260,031.06 and 107,856 is: 148,840.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,428.88 : 260,031.06 = 107,856 : x
  2. Step 2: Convert to fraction form
    188,428.88/260,031.06 = 107,856/x
  3. Step 3: Cross multiply
    188,428.88x = 260,031.06 × 107,856
  4. Step 4: Simplify right side
    188,428.88x = 28,045,910,007.36
  5. Step 5: Solve for x
    x = 28,045,910,007.36/188,428.88
  6. Step 6: Final answer
    x = 148,840.83

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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.