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Finding the Fourth Proportional to 136,886.86, 188,901.87 and 76,458.36

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Solution

The fourth proportional to 136,886.86, 188,901.87 and 76,458.36 is: 105,511.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,886.86 : 188,901.87 = 76,458.36 : x
  2. Step 2: Convert to fraction form
    136,886.86/188,901.87 = 76,458.36/x
  3. Step 3: Cross multiply
    136,886.86x = 188,901.87 × 76,458.36
  4. Step 4: Simplify right side
    136,886.86x = 14,443,127,181.13
  5. Step 5: Solve for x
    x = 14,443,127,181.13/136,886.86
  6. Step 6: Final answer
    x = 105,511.43

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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.