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Finding the Fourth Proportional to 100,618.26, 138,822.89 and 60,317.31

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Solution

The fourth proportional to 100,618.26, 138,822.89 and 60,317.31 is: 83,219.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,618.26 : 138,822.89 = 60,317.31 : x
  2. Step 2: Convert to fraction form
    100,618.26/138,822.89 = 60,317.31/x
  3. Step 3: Cross multiply
    100,618.26x = 138,822.89 × 60,317.31
  4. Step 4: Simplify right side
    100,618.26x = 8,373,422,989.64
  5. Step 5: Solve for x
    x = 8,373,422,989.64/100,618.26
  6. Step 6: Final answer
    x = 83,219.72

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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.