Home / 258,898.32-388,364.22-81,412.20

Finding the Fourth Proportional to 258,898.32, 388,364.22 and 81,412.20

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Solution

The fourth proportional to 258,898.32, 388,364.22 and 81,412.20 is: 122,123.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,898.32 : 388,364.22 = 81,412.20 : x
  2. Step 2: Convert to fraction form
    258,898.32/388,364.22 = 81,412.20/x
  3. Step 3: Cross multiply
    258,898.32x = 388,364.22 × 81,412.20
  4. Step 4: Simplify right side
    258,898.32x = 31,617,585,551.48
  5. Step 5: Solve for x
    x = 31,617,585,551.48/258,898.32
  6. Step 6: Final answer
    x = 122,123.56

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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.