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Finding the Fourth Proportional to 100,651.63, 138,902.36 and 55,333.07

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Solution

The fourth proportional to 100,651.63, 138,902.36 and 55,333.07 is: 76,361.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,651.63 : 138,902.36 = 55,333.07 : x
  2. Step 2: Convert to fraction form
    100,651.63/138,902.36 = 55,333.07/x
  3. Step 3: Cross multiply
    100,651.63x = 138,902.36 × 55,333.07
  4. Step 4: Simplify right side
    100,651.63x = 7,685,894,079.64
  5. Step 5: Solve for x
    x = 7,685,894,079.64/100,651.63
  6. Step 6: Final answer
    x = 76,361.35

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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.