Home / 81,546.45-112,477.21-78,803.18

Finding the Fourth Proportional to 81,546.45, 112,477.21 and 78,803.18

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Solution

The fourth proportional to 81,546.45, 112,477.21 and 78,803.18 is: 108,693.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,546.45 : 112,477.21 = 78,803.18 : x
  2. Step 2: Convert to fraction form
    81,546.45/112,477.21 = 78,803.18/x
  3. Step 3: Cross multiply
    81,546.45x = 112,477.21 × 78,803.18
  4. Step 4: Simplify right side
    81,546.45x = 8,863,561,487.92
  5. Step 5: Solve for x
    x = 8,863,561,487.92/81,546.45
  6. Step 6: Final answer
    x = 108,693.41

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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.