Home / 211,195.96-316,738.32-78,114.36

Finding the Fourth Proportional to 211,195.96, 316,738.32 and 78,114.36

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Solution

The fourth proportional to 211,195.96, 316,738.32 and 78,114.36 is: 117,150.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,195.96 : 316,738.32 = 78,114.36 : x
  2. Step 2: Convert to fraction form
    211,195.96/316,738.32 = 78,114.36/x
  3. Step 3: Cross multiply
    211,195.96x = 316,738.32 × 78,114.36
  4. Step 4: Simplify right side
    211,195.96x = 24,741,811,154.28
  5. Step 5: Solve for x
    x = 24,741,811,154.28/211,195.96
  6. Step 6: Final answer
    x = 117,150.97

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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.