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Finding the Fourth Proportional to 86,085.64, 118,792.74 and 50,285.80

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Solution

The fourth proportional to 86,085.64, 118,792.74 and 50,285.80 is: 69,391.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,085.64 : 118,792.74 = 50,285.80 : x
  2. Step 2: Convert to fraction form
    86,085.64/118,792.74 = 50,285.80/x
  3. Step 3: Cross multiply
    86,085.64x = 118,792.74 × 50,285.80
  4. Step 4: Simplify right side
    86,085.64x = 5,973,587,965.09
  5. Step 5: Solve for x
    x = 5,973,587,965.09/86,085.64
  6. Step 6: Final answer
    x = 69,391.22

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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.