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Finding the Fourth Proportional to 72,486.63, 100,076.41 and 48,321.63

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Solution

The fourth proportional to 72,486.63, 100,076.41 and 48,321.63 is: 66,713.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,486.63 : 100,076.41 = 48,321.63 : x
  2. Step 2: Convert to fraction form
    72,486.63/100,076.41 = 48,321.63/x
  3. Step 3: Cross multiply
    72,486.63x = 100,076.41 × 48,321.63
  4. Step 4: Simplify right side
    72,486.63x = 4,835,855,316.15
  5. Step 5: Solve for x
    x = 4,835,855,316.15/72,486.63
  6. Step 6: Final answer
    x = 66,713.76

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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.