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Finding the Fourth Proportional to 228,618.65, 315,490.33 and 126,643.80

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Solution

The fourth proportional to 228,618.65, 315,490.33 and 126,643.80 is: 174,766.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,618.65 : 315,490.33 = 126,643.80 : x
  2. Step 2: Convert to fraction form
    228,618.65/315,490.33 = 126,643.80/x
  3. Step 3: Cross multiply
    228,618.65x = 315,490.33 × 126,643.80
  4. Step 4: Simplify right side
    228,618.65x = 39,954,893,621.24
  5. Step 5: Solve for x
    x = 39,954,893,621.24/228,618.65
  6. Step 6: Final answer
    x = 174,766.56

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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.