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Finding the Fourth Proportional to 109,405.63, 151,007.88 and 71,260.26

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Solution

The fourth proportional to 109,405.63, 151,007.88 and 71,260.26 is: 98,357.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,405.63 : 151,007.88 = 71,260.26 : x
  2. Step 2: Convert to fraction form
    109,405.63/151,007.88 = 71,260.26/x
  3. Step 3: Cross multiply
    109,405.63x = 151,007.88 × 71,260.26
  4. Step 4: Simplify right side
    109,405.63x = 10,760,860,790.85
  5. Step 5: Solve for x
    x = 10,760,860,790.85/109,405.63
  6. Step 6: Final answer
    x = 98,357.47

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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.