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Finding the Fourth Proportional to 72,003.45, 100,571.55 and 72,003.45

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Solution

The fourth proportional to 72,003.45, 100,571.55 and 72,003.45 is: 100,571.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,003.45 : 100,571.55 = 72,003.45 : x
  2. Step 2: Convert to fraction form
    72,003.45/100,571.55 = 72,003.45/x
  3. Step 3: Cross multiply
    72,003.45x = 100,571.55 × 72,003.45
  4. Step 4: Simplify right side
    72,003.45x = 7,241,498,571.85
  5. Step 5: Solve for x
    x = 7,241,498,571.85/72,003.45
  6. Step 6: Final answer
    x = 100,571.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.