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Finding the Fourth Proportional to 219,139.80, 328,742.55 and 92,779.80

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Solution

The fourth proportional to 219,139.80, 328,742.55 and 92,779.80 is: 139,183.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,139.80 : 328,742.55 = 92,779.80 : x
  2. Step 2: Convert to fraction form
    219,139.80/328,742.55 = 92,779.80/x
  3. Step 3: Cross multiply
    219,139.80x = 328,742.55 × 92,779.80
  4. Step 4: Simplify right side
    219,139.80x = 30,500,668,040.49
  5. Step 5: Solve for x
    x = 30,500,668,040.49/219,139.80
  6. Step 6: Final answer
    x = 139,183.61

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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.