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Finding the Fourth Proportional to 138,327.99, 190,980.91 and 112,895.11

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Solution

The fourth proportional to 138,327.99, 190,980.91 and 112,895.11 is: 155,867.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,327.99 : 190,980.91 = 112,895.11 : x
  2. Step 2: Convert to fraction form
    138,327.99/190,980.91 = 112,895.11/x
  3. Step 3: Cross multiply
    138,327.99x = 190,980.91 × 112,895.11
  4. Step 4: Simplify right side
    138,327.99x = 21,560,810,277.87
  5. Step 5: Solve for x
    x = 21,560,810,277.87/138,327.99
  6. Step 6: Final answer
    x = 155,867.30

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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.