Home / 258,288.72-386,711.37-139,534.62

Finding the Fourth Proportional to 258,288.72, 386,711.37 and 139,534.62

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Solution

The fourth proportional to 258,288.72, 386,711.37 and 139,534.62 is: 208,912.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,288.72 : 386,711.37 = 139,534.62 : x
  2. Step 2: Convert to fraction form
    258,288.72/386,711.37 = 139,534.62/x
  3. Step 3: Cross multiply
    258,288.72x = 386,711.37 × 139,534.62
  4. Step 4: Simplify right side
    258,288.72x = 53,959,624,062.63
  5. Step 5: Solve for x
    x = 53,959,624,062.63/258,288.72
  6. Step 6: Final answer
    x = 208,912.04

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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.