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Finding the Fourth Proportional to 72,950.56, 100,671.77 and 39,416.56

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Solution

The fourth proportional to 72,950.56, 100,671.77 and 39,416.56 is: 54,394.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,950.56 : 100,671.77 = 39,416.56 : x
  2. Step 2: Convert to fraction form
    72,950.56/100,671.77 = 39,416.56/x
  3. Step 3: Cross multiply
    72,950.56x = 100,671.77 × 39,416.56
  4. Step 4: Simplify right side
    72,950.56x = 3,968,134,709.37
  5. Step 5: Solve for x
    x = 3,968,134,709.37/72,950.56
  6. Step 6: Final answer
    x = 54,394.85

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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.