Home / 100,830.24-139,130.30-58,380.57

Finding the Fourth Proportional to 100,830.24, 139,130.30 and 58,380.57

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Solution

The fourth proportional to 100,830.24, 139,130.30 and 58,380.57 is: 80,556.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,830.24 : 139,130.30 = 58,380.57 : x
  2. Step 2: Convert to fraction form
    100,830.24/139,130.30 = 58,380.57/x
  3. Step 3: Cross multiply
    100,830.24x = 139,130.30 × 58,380.57
  4. Step 4: Simplify right side
    100,830.24x = 8,122,505,926.37
  5. Step 5: Solve for x
    x = 8,122,505,926.37/100,830.24
  6. Step 6: Final answer
    x = 80,556.25

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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.