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Finding the Fourth Proportional to 81,379.86, 112,299.21 and 45,563.82

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Solution

The fourth proportional to 81,379.86, 112,299.21 and 45,563.82 is: 62,875.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,379.86 : 112,299.21 = 45,563.82 : x
  2. Step 2: Convert to fraction form
    81,379.86/112,299.21 = 45,563.82/x
  3. Step 3: Cross multiply
    81,379.86x = 112,299.21 × 45,563.82
  4. Step 4: Simplify right side
    81,379.86x = 5,116,780,990.58
  5. Step 5: Solve for x
    x = 5,116,780,990.58/81,379.86
  6. Step 6: Final answer
    x = 62,875.27

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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.