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Finding the Fourth Proportional to 258,309.56, 387,457.18 and 68,771.55

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Solution

The fourth proportional to 258,309.56, 387,457.18 and 68,771.55 is: 103,155.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,309.56 : 387,457.18 = 68,771.55 : x
  2. Step 2: Convert to fraction form
    258,309.56/387,457.18 = 68,771.55/x
  3. Step 3: Cross multiply
    258,309.56x = 387,457.18 × 68,771.55
  4. Step 4: Simplify right side
    258,309.56x = 26,646,032,020.41
  5. Step 5: Solve for x
    x = 26,646,032,020.41/258,309.56
  6. Step 6: Final answer
    x = 103,155.42

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1.5x scale

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.