Home / 89,640.43-123,710.93-51,403.48

Finding the Fourth Proportional to 89,640.43, 123,710.93 and 51,403.48

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Solution

The fourth proportional to 89,640.43, 123,710.93 and 51,403.48 is: 70,940.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,640.43 : 123,710.93 = 51,403.48 : x
  2. Step 2: Convert to fraction form
    89,640.43/123,710.93 = 51,403.48/x
  3. Step 3: Cross multiply
    89,640.43x = 123,710.93 × 51,403.48
  4. Step 4: Simplify right side
    89,640.43x = 6,359,172,135.27
  5. Step 5: Solve for x
    x = 6,359,172,135.27/89,640.43
  6. Step 6: Final answer
    x = 70,940.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.