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Finding the Fourth Proportional to 76,939.50, 106,176.66 and 43,405.50

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Solution

The fourth proportional to 76,939.50, 106,176.66 and 43,405.50 is: 59,899.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,939.50 : 106,176.66 = 43,405.50 : x
  2. Step 2: Convert to fraction form
    76,939.50/106,176.66 = 43,405.50/x
  3. Step 3: Cross multiply
    76,939.50x = 106,176.66 × 43,405.50
  4. Step 4: Simplify right side
    76,939.50x = 4,608,651,015.63
  5. Step 5: Solve for x
    x = 4,608,651,015.63/76,939.50
  6. Step 6: Final answer
    x = 59,899.67

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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.