Home / 138,611.58-191,283.70-78,182.04

Finding the Fourth Proportional to 138,611.58, 191,283.70 and 78,182.04

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Solution

The fourth proportional to 138,611.58, 191,283.70 and 78,182.04 is: 107,891.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,611.58 : 191,283.70 = 78,182.04 : x
  2. Step 2: Convert to fraction form
    138,611.58/191,283.70 = 78,182.04/x
  3. Step 3: Cross multiply
    138,611.58x = 191,283.70 × 78,182.04
  4. Step 4: Simplify right side
    138,611.58x = 14,954,949,884.75
  5. Step 5: Solve for x
    x = 14,954,949,884.75/138,611.58
  6. Step 6: Final answer
    x = 107,891.06

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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.