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Finding the Fourth Proportional to 138,568.00, 191,224.12 and 74,905.79

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Solution

The fourth proportional to 138,568.00, 191,224.12 and 74,905.79 is: 103,370.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,568.00 : 191,224.12 = 74,905.79 : x
  2. Step 2: Convert to fraction form
    138,568.00/191,224.12 = 74,905.79/x
  3. Step 3: Cross multiply
    138,568.00x = 191,224.12 × 74,905.79
  4. Step 4: Simplify right side
    138,568.00x = 14,323,794,309.95
  5. Step 5: Solve for x
    x = 14,323,794,309.95/138,568.00
  6. Step 6: Final answer
    x = 103,370.15

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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.