Home / 72,180.54-99,611.37-40,350.78

Finding the Fourth Proportional to 72,180.54, 99,611.37 and 40,350.78

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Solution

The fourth proportional to 72,180.54, 99,611.37 and 40,350.78 is: 55,685.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,180.54 : 99,611.37 = 40,350.78 : x
  2. Step 2: Convert to fraction form
    72,180.54/99,611.37 = 40,350.78/x
  3. Step 3: Cross multiply
    72,180.54x = 99,611.37 × 40,350.78
  4. Step 4: Simplify right side
    72,180.54x = 4,019,396,476.37
  5. Step 5: Solve for x
    x = 4,019,396,476.37/72,180.54
  6. Step 6: Final answer
    x = 55,685.32

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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.