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Finding the Fourth Proportional to 138,899.67, 191,507.29 and 113,380.11

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Solution

The fourth proportional to 138,899.67, 191,507.29 and 113,380.11 is: 156,322.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,899.67 : 191,507.29 = 113,380.11 : x
  2. Step 2: Convert to fraction form
    138,899.67/191,507.29 = 113,380.11/x
  3. Step 3: Cross multiply
    138,899.67x = 191,507.29 × 113,380.11
  4. Step 4: Simplify right side
    138,899.67x = 21,713,117,606.00
  5. Step 5: Solve for x
    x = 21,713,117,606.00/138,899.67
  6. Step 6: Final answer
    x = 156,322.31

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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.