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Finding the Fourth Proportional to 119,718.62, 165,212.80 and 66,005.54

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Solution

The fourth proportional to 119,718.62, 165,212.80 and 66,005.54 is: 91,088.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,718.62 : 165,212.80 = 66,005.54 : x
  2. Step 2: Convert to fraction form
    119,718.62/165,212.80 = 66,005.54/x
  3. Step 3: Cross multiply
    119,718.62x = 165,212.80 × 66,005.54
  4. Step 4: Simplify right side
    119,718.62x = 10,904,959,087.83
  5. Step 5: Solve for x
    x = 10,904,959,087.83/119,718.62
  6. Step 6: Final answer
    x = 91,088.25

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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.