Home / 211,865.22-317,848.86-78,749.82

Finding the Fourth Proportional to 211,865.22, 317,848.86 and 78,749.82

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Solution

The fourth proportional to 211,865.22, 317,848.86 and 78,749.82 is: 118,143.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,865.22 : 317,848.86 = 78,749.82 : x
  2. Step 2: Convert to fraction form
    211,865.22/317,848.86 = 78,749.82/x
  3. Step 3: Cross multiply
    211,865.22x = 317,848.86 × 78,749.82
  4. Step 4: Simplify right side
    211,865.22x = 25,030,540,512.21
  5. Step 5: Solve for x
    x = 25,030,540,512.21/211,865.22
  6. Step 6: Final answer
    x = 118,143.70

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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.