Home / 121,911.12-168,243.89-68,192.93

Finding the Fourth Proportional to 121,911.12, 168,243.89 and 68,192.93

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Solution

The fourth proportional to 121,911.12, 168,243.89 and 68,192.93 is: 94,109.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,911.12 : 168,243.89 = 68,192.93 : x
  2. Step 2: Convert to fraction form
    121,911.12/168,243.89 = 68,192.93/x
  3. Step 3: Cross multiply
    121,911.12x = 168,243.89 × 68,192.93
  4. Step 4: Simplify right side
    121,911.12x = 11,473,043,893.34
  5. Step 5: Solve for x
    x = 11,473,043,893.34/121,911.12
  6. Step 6: Final answer
    x = 94,109.90

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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.