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Finding the Fourth Proportional to 77,949.31, 107,571.03 and 47,313.55

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Solution

The fourth proportional to 77,949.31, 107,571.03 and 47,313.55 is: 65,293.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,949.31 : 107,571.03 = 47,313.55 : x
  2. Step 2: Convert to fraction form
    77,949.31/107,571.03 = 47,313.55/x
  3. Step 3: Cross multiply
    77,949.31x = 107,571.03 × 47,313.55
  4. Step 4: Simplify right side
    77,949.31x = 5,089,567,306.46
  5. Step 5: Solve for x
    x = 5,089,567,306.46/77,949.31
  6. Step 6: Final answer
    x = 65,293.30

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1.5x scale

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.