Home / 257,485.15-386,334.42-139,017.25

Finding the Fourth Proportional to 257,485.15, 386,334.42 and 139,017.25

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Solution

The fourth proportional to 257,485.15, 386,334.42 and 139,017.25 is: 208,583.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,485.15 : 386,334.42 = 139,017.25 : x
  2. Step 2: Convert to fraction form
    257,485.15/386,334.42 = 139,017.25/x
  3. Step 3: Cross multiply
    257,485.15x = 386,334.42 × 139,017.25
  4. Step 4: Simplify right side
    257,485.15x = 53,707,148,648.75
  5. Step 5: Solve for x
    x = 53,707,148,648.75/257,485.15
  6. Step 6: Final answer
    x = 208,583.48

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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.