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Finding the Fourth Proportional to 72,745.89, 100,403.14 and 45,534.60

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Solution

The fourth proportional to 72,745.89, 100,403.14 and 45,534.60 is: 62,846.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,745.89 : 100,403.14 = 45,534.60 : x
  2. Step 2: Convert to fraction form
    72,745.89/100,403.14 = 45,534.60/x
  3. Step 3: Cross multiply
    72,745.89x = 100,403.14 × 45,534.60
  4. Step 4: Simplify right side
    72,745.89x = 4,571,817,183.49
  5. Step 5: Solve for x
    x = 4,571,817,183.49/72,745.89
  6. Step 6: Final answer
    x = 62,846.40

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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.