Home / 211,680.32-317,490.56-71,420.48

Finding the Fourth Proportional to 211,680.32, 317,490.56 and 71,420.48

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Solution

The fourth proportional to 211,680.32, 317,490.56 and 71,420.48 is: 107,120.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,680.32 : 317,490.56 = 71,420.48 : x
  2. Step 2: Convert to fraction form
    211,680.32/317,490.56 = 71,420.48/x
  3. Step 3: Cross multiply
    211,680.32x = 317,490.56 × 71,420.48
  4. Step 4: Simplify right side
    211,680.32x = 22,675,328,190.67
  5. Step 5: Solve for x
    x = 22,675,328,190.67/211,680.32
  6. Step 6: Final answer
    x = 107,120.63

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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.