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Finding the Fourth Proportional to 158,391.85, 218,586.20 and 86,771.86

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Solution

The fourth proportional to 158,391.85, 218,586.20 and 86,771.86 is: 119,748.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,391.85 : 218,586.20 = 86,771.86 : x
  2. Step 2: Convert to fraction form
    158,391.85/218,586.20 = 86,771.86/x
  3. Step 3: Cross multiply
    158,391.85x = 218,586.20 × 86,771.86
  4. Step 4: Simplify right side
    158,391.85x = 18,967,131,144.33
  5. Step 5: Solve for x
    x = 18,967,131,144.33/158,391.85
  6. Step 6: Final answer
    x = 119,748.15

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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.