Home / 231,987.75-320,137.65-136,500.63

Finding the Fourth Proportional to 231,987.75, 320,137.65 and 136,500.63

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Solution

The fourth proportional to 231,987.75, 320,137.65 and 136,500.63 is: 188,367.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,987.75 : 320,137.65 = 136,500.63 : x
  2. Step 2: Convert to fraction form
    231,987.75/320,137.65 = 136,500.63/x
  3. Step 3: Cross multiply
    231,987.75x = 320,137.65 × 136,500.63
  4. Step 4: Simplify right side
    231,987.75x = 43,698,990,911.72
  5. Step 5: Solve for x
    x = 43,698,990,911.72/231,987.75
  6. Step 6: Final answer
    x = 188,367.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.