Home / 219,128.38-328,555.87-100,647.66

Finding the Fourth Proportional to 219,128.38, 328,555.87 and 100,647.66

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Solution

The fourth proportional to 219,128.38, 328,555.87 and 100,647.66 is: 150,908.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,128.38 : 328,555.87 = 100,647.66 : x
  2. Step 2: Convert to fraction form
    219,128.38/328,555.87 = 100,647.66/x
  3. Step 3: Cross multiply
    219,128.38x = 328,555.87 × 100,647.66
  4. Step 4: Simplify right side
    219,128.38x = 33,068,379,494.76
  5. Step 5: Solve for x
    x = 33,068,379,494.76/219,128.38
  6. Step 6: Final answer
    x = 150,908.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.