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Finding the Fourth Proportional to 81,612.88, 112,636.78 and 45,804.86

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Solution

The fourth proportional to 81,612.88, 112,636.78 and 45,804.86 is: 63,216.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,612.88 : 112,636.78 = 45,804.86 : x
  2. Step 2: Convert to fraction form
    81,612.88/112,636.78 = 45,804.86/x
  3. Step 3: Cross multiply
    81,612.88x = 112,636.78 × 45,804.86
  4. Step 4: Simplify right side
    81,612.88x = 5,159,311,683.44
  5. Step 5: Solve for x
    x = 5,159,311,683.44/81,612.88
  6. Step 6: Final answer
    x = 63,216.88

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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.