Home / 138,400.62-190,996.83-77,971.92

Finding the Fourth Proportional to 138,400.62, 190,996.83 and 77,971.92

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Solution

The fourth proportional to 138,400.62, 190,996.83 and 77,971.92 is: 107,603.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,400.62 : 190,996.83 = 77,971.92 : x
  2. Step 2: Convert to fraction form
    138,400.62/190,996.83 = 77,971.92/x
  3. Step 3: Cross multiply
    138,400.62x = 190,996.83 × 77,971.92
  4. Step 4: Simplify right side
    138,400.62x = 14,892,389,549.01
  5. Step 5: Solve for x
    x = 14,892,389,549.01/138,400.62
  6. Step 6: Final answer
    x = 107,603.49

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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.