Home / 258,093.45-387,140.18-139,995.45

Finding the Fourth Proportional to 258,093.45, 387,140.18 and 139,995.45

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Solution

The fourth proportional to 258,093.45, 387,140.18 and 139,995.45 is: 209,993.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,093.45 : 387,140.18 = 139,995.45 : x
  2. Step 2: Convert to fraction form
    258,093.45/387,140.18 = 139,995.45/x
  3. Step 3: Cross multiply
    258,093.45x = 387,140.18 × 139,995.45
  4. Step 4: Simplify right side
    258,093.45x = 54,197,863,012.20
  5. Step 5: Solve for x
    x = 54,197,863,012.20/258,093.45
  6. Step 6: Final answer
    x = 209,993.18

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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.