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Finding the Fourth Proportional to 135,371.58, 186,810.42 and 74,940.90

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Solution

The fourth proportional to 135,371.58, 186,810.42 and 74,940.90 is: 103,417.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,371.58 : 186,810.42 = 74,940.90 : x
  2. Step 2: Convert to fraction form
    135,371.58/186,810.42 = 74,940.90/x
  3. Step 3: Cross multiply
    135,371.58x = 186,810.42 × 74,940.90
  4. Step 4: Simplify right side
    135,371.58x = 13,999,741,004.18
  5. Step 5: Solve for x
    x = 13,999,741,004.18/135,371.58
  6. Step 6: Final answer
    x = 103,417.14

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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.