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Finding the Fourth Proportional to 76,750.50, 115,132.23 and 21,346.50

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Solution

The fourth proportional to 76,750.50, 115,132.23 and 21,346.50 is: 32,021.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,750.50 : 115,132.23 = 21,346.50 : x
  2. Step 2: Convert to fraction form
    76,750.50/115,132.23 = 21,346.50/x
  3. Step 3: Cross multiply
    76,750.50x = 115,132.23 × 21,346.50
  4. Step 4: Simplify right side
    76,750.50x = 2,457,670,147.70
  5. Step 5: Solve for x
    x = 2,457,670,147.70/76,750.50
  6. Step 6: Final answer
    x = 32,021.55

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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.