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Finding the Fourth Proportional to 72,728.25, 100,365.60 and 40,896.87

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Solution

The fourth proportional to 72,728.25, 100,365.60 and 40,896.87 is: 56,438.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,728.25 : 100,365.60 = 40,896.87 : x
  2. Step 2: Convert to fraction form
    72,728.25/100,365.60 = 40,896.87/x
  3. Step 3: Cross multiply
    72,728.25x = 100,365.60 × 40,896.87
  4. Step 4: Simplify right side
    72,728.25x = 4,104,638,895.67
  5. Step 5: Solve for x
    x = 4,104,638,895.67/72,728.25
  6. Step 6: Final answer
    x = 56,438.03

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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.