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Finding the Fourth Proportional to 228,496.79, 315,328.91 and 131,647.21

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Solution

The fourth proportional to 228,496.79, 315,328.91 and 131,647.21 is: 181,675.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,496.79 : 315,328.91 = 131,647.21 : x
  2. Step 2: Convert to fraction form
    228,496.79/315,328.91 = 131,647.21/x
  3. Step 3: Cross multiply
    228,496.79x = 315,328.91 × 131,647.21
  4. Step 4: Simplify right side
    228,496.79x = 41,512,169,787.28
  5. Step 5: Solve for x
    x = 41,512,169,787.28/228,496.79
  6. Step 6: Final answer
    x = 181,675.07

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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.