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Finding the Fourth Proportional to 219,576.42, 303,018.90 and 128,934.39

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Solution

The fourth proportional to 219,576.42, 303,018.90 and 128,934.39 is: 177,931.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,576.42 : 303,018.90 = 128,934.39 : x
  2. Step 2: Convert to fraction form
    219,576.42/303,018.90 = 128,934.39/x
  3. Step 3: Cross multiply
    219,576.42x = 303,018.90 × 128,934.39
  4. Step 4: Simplify right side
    219,576.42x = 39,069,557,029.97
  5. Step 5: Solve for x
    x = 39,069,557,029.97/219,576.42
  6. Step 6: Final answer
    x = 177,931.48

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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.