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Finding the Fourth Proportional to 104,405.91, 144,078.60 and 61,390.26

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Solution

The fourth proportional to 104,405.91, 144,078.60 and 61,390.26 is: 84,717.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,405.91 : 144,078.60 = 61,390.26 : x
  2. Step 2: Convert to fraction form
    104,405.91/144,078.60 = 61,390.26/x
  3. Step 3: Cross multiply
    104,405.91x = 144,078.60 × 61,390.26
  4. Step 4: Simplify right side
    104,405.91x = 8,845,022,714.44
  5. Step 5: Solve for x
    x = 8,845,022,714.44/104,405.91
  6. Step 6: Final answer
    x = 84,717.64

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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.