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Finding the Fourth Proportional to 100,376.58, 138,531.25 and 60,090.33

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Solution

The fourth proportional to 100,376.58, 138,531.25 and 60,090.33 is: 82,931.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,376.58 : 138,531.25 = 60,090.33 : x
  2. Step 2: Convert to fraction form
    100,376.58/138,531.25 = 60,090.33/x
  3. Step 3: Cross multiply
    100,376.58x = 138,531.25 × 60,090.33
  4. Step 4: Simplify right side
    100,376.58x = 8,324,388,678.04
  5. Step 5: Solve for x
    x = 8,324,388,678.04/100,376.58
  6. Step 6: Final answer
    x = 82,931.58

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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.