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Finding the Fourth Proportional to 136,886.67, 188,901.61 and 76,458.17

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Solution

The fourth proportional to 136,886.67, 188,901.61 and 76,458.17 is: 105,511.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,886.67 : 188,901.61 = 76,458.17 : x
  2. Step 2: Convert to fraction form
    136,886.67/188,901.61 = 76,458.17/x
  3. Step 3: Cross multiply
    136,886.67x = 188,901.61 × 76,458.17
  4. Step 4: Simplify right side
    136,886.67x = 14,443,071,410.65
  5. Step 5: Solve for x
    x = 14,443,071,410.65/136,886.67
  6. Step 6: Final answer
    x = 105,511.16

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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.