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Finding the Fourth Proportional to 72,571.69, 100,142.08 and 40,734.37

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Solution

The fourth proportional to 72,571.69, 100,142.08 and 40,734.37 is: 56,209.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,571.69 : 100,142.08 = 40,734.37 : x
  2. Step 2: Convert to fraction form
    72,571.69/100,142.08 = 40,734.37/x
  3. Step 3: Cross multiply
    72,571.69x = 100,142.08 × 40,734.37
  4. Step 4: Simplify right side
    72,571.69x = 4,079,224,539.29
  5. Step 5: Solve for x
    x = 4,079,224,539.29/72,571.69
  6. Step 6: Final answer
    x = 56,209.58

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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.