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Finding the Fourth Proportional to 158,668.87, 218,961.75 and 86,071.55

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Solution

The fourth proportional to 158,668.87, 218,961.75 and 86,071.55 is: 118,778.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,668.87 : 218,961.75 = 86,071.55 : x
  2. Step 2: Convert to fraction form
    158,668.87/218,961.75 = 86,071.55/x
  3. Step 3: Cross multiply
    158,668.87x = 218,961.75 × 86,071.55
  4. Step 4: Simplify right side
    158,668.87x = 18,846,376,782.85
  5. Step 5: Solve for x
    x = 18,846,376,782.85/158,668.87
  6. Step 6: Final answer
    x = 118,778.04

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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.