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Finding the Fourth Proportional to 258,439.42, 387,659.13 and 118,099.63

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Solution

The fourth proportional to 258,439.42, 387,659.13 and 118,099.63 is: 177,149.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,439.42 : 387,659.13 = 118,099.63 : x
  2. Step 2: Convert to fraction form
    258,439.42/387,659.13 = 118,099.63/x
  3. Step 3: Cross multiply
    258,439.42x = 387,659.13 × 118,099.63
  4. Step 4: Simplify right side
    258,439.42x = 45,782,397,290.33
  5. Step 5: Solve for x
    x = 45,782,397,290.33/258,439.42
  6. Step 6: Final answer
    x = 177,149.44

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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.