Home / 81,084.63-121,633.44-28,505.91

Finding the Fourth Proportional to 81,084.63, 121,633.44 and 28,505.91

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Solution

The fourth proportional to 81,084.63, 121,633.44 and 28,505.91 is: 42,761.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,084.63 : 121,633.44 = 28,505.91 : x
  2. Step 2: Convert to fraction form
    81,084.63/121,633.44 = 28,505.91/x
  3. Step 3: Cross multiply
    81,084.63x = 121,633.44 × 28,505.91
  4. Step 4: Simplify right side
    81,084.63x = 3,467,271,893.63
  5. Step 5: Solve for x
    x = 3,467,271,893.63/81,084.63
  6. Step 6: Final answer
    x = 42,761.15

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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.