Home / 121,890.62-168,208.06-68,175.60

Finding the Fourth Proportional to 121,890.62, 168,208.06 and 68,175.60

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Solution

The fourth proportional to 121,890.62, 168,208.06 and 68,175.60 is: 94,081.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,890.62 : 168,208.06 = 68,175.60 : x
  2. Step 2: Convert to fraction form
    121,890.62/168,208.06 = 68,175.60/x
  3. Step 3: Cross multiply
    121,890.62x = 168,208.06 × 68,175.60
  4. Step 4: Simplify right side
    121,890.62x = 11,467,685,415.34
  5. Step 5: Solve for x
    x = 11,467,685,415.34/121,890.62
  6. Step 6: Final answer
    x = 94,081.77

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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.