Home / 258,475.32-387,638.10-100,668.60

Finding the Fourth Proportional to 258,475.32, 387,638.10 and 100,668.60

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Solution

The fourth proportional to 258,475.32, 387,638.10 and 100,668.60 is: 150,973.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,475.32 : 387,638.10 = 100,668.60 : x
  2. Step 2: Convert to fraction form
    258,475.32/387,638.10 = 100,668.60/x
  3. Step 3: Cross multiply
    258,475.32x = 387,638.10 × 100,668.60
  4. Step 4: Simplify right side
    258,475.32x = 39,022,984,833.66
  5. Step 5: Solve for x
    x = 39,022,984,833.66/258,475.32
  6. Step 6: Final answer
    x = 150,973.74

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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.