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Finding the Fourth Proportional to 219,818.42, 303,351.54 and 129,176.42

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Solution

The fourth proportional to 219,818.42, 303,351.54 and 129,176.42 is: 178,264.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,818.42 : 303,351.54 = 129,176.42 : x
  2. Step 2: Convert to fraction form
    219,818.42/303,351.54 = 129,176.42/x
  3. Step 3: Cross multiply
    219,818.42x = 303,351.54 × 129,176.42
  4. Step 4: Simplify right side
    219,818.42x = 39,185,865,938.69
  5. Step 5: Solve for x
    x = 39,185,865,938.69/219,818.42
  6. Step 6: Final answer
    x = 178,264.71

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1.5x scale

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.