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Finding the Fourth Proportional to 85,611.90, 128,439.72 and 33,007.26

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Solution

The fourth proportional to 85,611.90, 128,439.72 and 33,007.26 is: 49,519.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,611.90 : 128,439.72 = 33,007.26 : x
  2. Step 2: Convert to fraction form
    85,611.90/128,439.72 = 33,007.26/x
  3. Step 3: Cross multiply
    85,611.90x = 128,439.72 × 33,007.26
  4. Step 4: Simplify right side
    85,611.90x = 4,239,443,232.37
  5. Step 5: Solve for x
    x = 4,239,443,232.37/85,611.90
  6. Step 6: Final answer
    x = 49,519.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.