Home / 80,687.21-121,051.26-57,041.28

Finding the Fourth Proportional to 80,687.21, 121,051.26 and 57,041.28

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Solution

The fourth proportional to 80,687.21, 121,051.26 and 57,041.28 is: 85,576.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,687.21 : 121,051.26 = 57,041.28 : x
  2. Step 2: Convert to fraction form
    80,687.21/121,051.26 = 57,041.28/x
  3. Step 3: Cross multiply
    80,687.21x = 121,051.26 × 57,041.28
  4. Step 4: Simplify right side
    80,687.21x = 6,904,918,816.01
  5. Step 5: Solve for x
    x = 6,904,918,816.01/80,687.21
  6. Step 6: Final answer
    x = 85,576.38

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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.