Home / 211,873.10-317,731.74-85,479.54

Finding the Fourth Proportional to 211,873.10, 317,731.74 and 85,479.54

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Solution

The fourth proportional to 211,873.10, 317,731.74 and 85,479.54 is: 128,187.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,873.10 : 317,731.74 = 85,479.54 : x
  2. Step 2: Convert to fraction form
    211,873.10/317,731.74 = 85,479.54/x
  3. Step 3: Cross multiply
    211,873.10x = 317,731.74 × 85,479.54
  4. Step 4: Simplify right side
    211,873.10x = 27,159,562,978.60
  5. Step 5: Solve for x
    x = 27,159,562,978.60/211,873.10
  6. Step 6: Final answer
    x = 128,187.88

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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.