Home / 72,749.47-100,393.80-40,918.78

Finding the Fourth Proportional to 72,749.47, 100,393.80 and 40,918.78

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Solution

The fourth proportional to 72,749.47, 100,393.80 and 40,918.78 is: 56,467.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,749.47 : 100,393.80 = 40,918.78 : x
  2. Step 2: Convert to fraction form
    72,749.47/100,393.80 = 40,918.78/x
  3. Step 3: Cross multiply
    72,749.47x = 100,393.80 × 40,918.78
  4. Step 4: Simplify right side
    72,749.47x = 4,107,991,815.56
  5. Step 5: Solve for x
    x = 4,107,991,815.56/72,749.47
  6. Step 6: Final answer
    x = 56,467.65

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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.