Home / 211,839.75-317,731.32-78,701.85

Finding the Fourth Proportional to 211,839.75, 317,731.32 and 78,701.85

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Solution

The fourth proportional to 211,839.75, 317,731.32 and 78,701.85 is: 118,042.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,839.75 : 317,731.32 = 78,701.85 : x
  2. Step 2: Convert to fraction form
    211,839.75/317,731.32 = 78,701.85/x
  3. Step 3: Cross multiply
    211,839.75x = 317,731.32 × 78,701.85
  4. Step 4: Simplify right side
    211,839.75x = 25,006,042,686.94
  5. Step 5: Solve for x
    x = 25,006,042,686.94/211,839.75
  6. Step 6: Final answer
    x = 118,042.26

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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.