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Finding the Fourth Proportional to 43,405.67, 65,128.76 and 15,346.97

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Solution

The fourth proportional to 43,405.67, 65,128.76 and 15,346.97 is: 23,027.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,405.67 : 65,128.76 = 15,346.97 : x
  2. Step 2: Convert to fraction form
    43,405.67/65,128.76 = 15,346.97/x
  3. Step 3: Cross multiply
    43,405.67x = 65,128.76 × 15,346.97
  4. Step 4: Simplify right side
    43,405.67x = 999,529,025.26
  5. Step 5: Solve for x
    x = 999,529,025.26/43,405.67
  6. Step 6: Final answer
    x = 23,027.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.