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Finding the Fourth Proportional to 72,680.56, 100,274.28 and 47,218.96

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Solution

The fourth proportional to 72,680.56, 100,274.28 and 47,218.96 is: 65,145.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,680.56 : 100,274.28 = 47,218.96 : x
  2. Step 2: Convert to fraction form
    72,680.56/100,274.28 = 47,218.96/x
  3. Step 3: Cross multiply
    72,680.56x = 100,274.28 × 47,218.96
  4. Step 4: Simplify right side
    72,680.56x = 4,734,847,216.35
  5. Step 5: Solve for x
    x = 4,734,847,216.35/72,680.56
  6. Step 6: Final answer
    x = 65,145.99

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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.