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Finding the Fourth Proportional to 258,515.85, 387,687.67 and 108,728.22

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Solution

The fourth proportional to 258,515.85, 387,687.67 and 108,728.22 is: 163,056.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,515.85 : 387,687.67 = 108,728.22 : x
  2. Step 2: Convert to fraction form
    258,515.85/387,687.67 = 108,728.22/x
  3. Step 3: Cross multiply
    258,515.85x = 387,687.67 × 108,728.22
  4. Step 4: Simplify right side
    258,515.85x = 42,152,591,457.06
  5. Step 5: Solve for x
    x = 42,152,591,457.06/258,515.85
  6. Step 6: Final answer
    x = 163,056.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.