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Finding the Fourth Proportional to 119,907, 165,471.66 and 66,915

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Solution

The fourth proportional to 119,907, 165,471.66 and 66,915 is: 92,342.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,907 : 165,471.66 = 66,915 : x
  2. Step 2: Convert to fraction form
    119,907/165,471.66 = 66,915/x
  3. Step 3: Cross multiply
    119,907x = 165,471.66 × 66,915
  4. Step 4: Simplify right side
    119,907x = 11,072,536,128.90
  5. Step 5: Solve for x
    x = 11,072,536,128.90/119,907
  6. Step 6: Final answer
    x = 92,342.70

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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.