Home / 211,803.06-317,634.12-85,410.66

Finding the Fourth Proportional to 211,803.06, 317,634.12 and 85,410.66

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Solution

The fourth proportional to 211,803.06, 317,634.12 and 85,410.66 is: 128,087.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,803.06 : 317,634.12 = 85,410.66 : x
  2. Step 2: Convert to fraction form
    211,803.06/317,634.12 = 85,410.66/x
  3. Step 3: Cross multiply
    211,803.06x = 317,634.12 × 85,410.66
  4. Step 4: Simplify right side
    211,803.06x = 27,129,339,827.72
  5. Step 5: Solve for x
    x = 27,129,339,827.72/211,803.06
  6. Step 6: Final answer
    x = 128,087.57

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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.