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Finding the Fourth Proportional to 135,168.84, 186,516.72 and 74,731.32

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Solution

The fourth proportional to 135,168.84, 186,516.72 and 74,731.32 is: 103,120.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,168.84 : 186,516.72 = 74,731.32 : x
  2. Step 2: Convert to fraction form
    135,168.84/186,516.72 = 74,731.32/x
  3. Step 3: Cross multiply
    135,168.84x = 186,516.72 × 74,731.32
  4. Step 4: Simplify right side
    135,168.84x = 13,938,640,687.67
  5. Step 5: Solve for x
    x = 13,938,640,687.67/135,168.84
  6. Step 6: Final answer
    x = 103,120.22

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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.