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Finding the Fourth Proportional to 138,435.54, 191,041.17 and 74,773.33

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Solution

The fourth proportional to 138,435.54, 191,041.17 and 74,773.33 is: 103,187.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,435.54 : 191,041.17 = 74,773.33 : x
  2. Step 2: Convert to fraction form
    138,435.54/191,041.17 = 74,773.33/x
  3. Step 3: Cross multiply
    138,435.54x = 191,041.17 × 74,773.33
  4. Step 4: Simplify right side
    138,435.54x = 14,284,784,448.00
  5. Step 5: Solve for x
    x = 14,284,784,448.00/138,435.54
  6. Step 6: Final answer
    x = 103,187.26

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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.