Home / 155,135.55-214,079.85-86,221.81

Finding the Fourth Proportional to 155,135.55, 214,079.85 and 86,221.81

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Solution

The fourth proportional to 155,135.55, 214,079.85 and 86,221.81 is: 118,982.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,135.55 : 214,079.85 = 86,221.81 : x
  2. Step 2: Convert to fraction form
    155,135.55/214,079.85 = 86,221.81/x
  3. Step 3: Cross multiply
    155,135.55x = 214,079.85 × 86,221.81
  4. Step 4: Simplify right side
    155,135.55x = 18,458,351,616.33
  5. Step 5: Solve for x
    x = 18,458,351,616.33/155,135.55
  6. Step 6: Final answer
    x = 118,982.09

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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.