Home / 189,890.40-284,586.42-139,735.68

Finding the Fourth Proportional to 189,890.40, 284,586.42 and 139,735.68

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Solution

The fourth proportional to 189,890.40, 284,586.42 and 139,735.68 is: 209,420.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,890.40 : 284,586.42 = 139,735.68 : x
  2. Step 2: Convert to fraction form
    189,890.40/284,586.42 = 139,735.68/x
  3. Step 3: Cross multiply
    189,890.40x = 284,586.42 × 139,735.68
  4. Step 4: Simplify right side
    189,890.40x = 39,766,876,917.47
  5. Step 5: Solve for x
    x = 39,766,876,917.47/189,890.40
  6. Step 6: Final answer
    x = 209,420.15

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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.