Home / 72,220.68-99,664.56-40,390.02

Finding the Fourth Proportional to 72,220.68, 99,664.56 and 40,390.02

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Solution

The fourth proportional to 72,220.68, 99,664.56 and 40,390.02 is: 55,738.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,220.68 : 99,664.56 = 40,390.02 : x
  2. Step 2: Convert to fraction form
    72,220.68/99,664.56 = 40,390.02/x
  3. Step 3: Cross multiply
    72,220.68x = 99,664.56 × 40,390.02
  4. Step 4: Simplify right side
    72,220.68x = 4,025,453,571.69
  5. Step 5: Solve for x
    x = 4,025,453,571.69/72,220.68
  6. Step 6: Final answer
    x = 55,738.24

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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.