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Finding the Fourth Proportional to 228,888.72, 315,834.48 and 133,321.68

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Solution

The fourth proportional to 228,888.72, 315,834.48 and 133,321.68 is: 183,965.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,888.72 : 315,834.48 = 133,321.68 : x
  2. Step 2: Convert to fraction form
    228,888.72/315,834.48 = 133,321.68/x
  3. Step 3: Cross multiply
    228,888.72x = 315,834.48 × 133,321.68
  4. Step 4: Simplify right side
    228,888.72x = 42,107,583,475.53
  5. Step 5: Solve for x
    x = 42,107,583,475.53/228,888.72
  6. Step 6: Final answer
    x = 183,965.31

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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.