Home / 72,743.18-100,378.49-40,911.39

Finding the Fourth Proportional to 72,743.18, 100,378.49 and 40,911.39

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Solution

The fourth proportional to 72,743.18, 100,378.49 and 40,911.39 is: 56,453.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,743.18 : 100,378.49 = 40,911.39 : x
  2. Step 2: Convert to fraction form
    72,743.18/100,378.49 = 40,911.39/x
  3. Step 3: Cross multiply
    72,743.18x = 100,378.49 × 40,911.39
  4. Step 4: Simplify right side
    72,743.18x = 4,106,623,347.44
  5. Step 5: Solve for x
    x = 4,106,623,347.44/72,743.18
  6. Step 6: Final answer
    x = 56,453.73

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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.