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Finding the Fourth Proportional to 72,548.56, 100,121.80 and 40,719.60

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Solution

The fourth proportional to 72,548.56, 100,121.80 and 40,719.60 is: 56,195.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,548.56 : 100,121.80 = 40,719.60 : x
  2. Step 2: Convert to fraction form
    72,548.56/100,121.80 = 40,719.60/x
  3. Step 3: Cross multiply
    72,548.56x = 100,121.80 × 40,719.60
  4. Step 4: Simplify right side
    72,548.56x = 4,076,919,647.28
  5. Step 5: Solve for x
    x = 4,076,919,647.28/72,548.56
  6. Step 6: Final answer
    x = 56,195.73

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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.