Home / 81,674.76-112,361.22-78,175.56

Finding the Fourth Proportional to 81,674.76, 112,361.22 and 78,175.56

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Solution

The fourth proportional to 81,674.76, 112,361.22 and 78,175.56 is: 107,547.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,674.76 : 112,361.22 = 78,175.56 : x
  2. Step 2: Convert to fraction form
    81,674.76/112,361.22 = 78,175.56/x
  3. Step 3: Cross multiply
    81,674.76x = 112,361.22 × 78,175.56
  4. Step 4: Simplify right side
    81,674.76x = 8,783,901,295.78
  5. Step 5: Solve for x
    x = 8,783,901,295.78/81,674.76
  6. Step 6: Final answer
    x = 107,547.32

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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.