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Finding the Fourth Proportional to 219,168.45, 328,749.08 and 69,408.50

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Solution

The fourth proportional to 219,168.45, 328,749.08 and 69,408.50 is: 104,111.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,168.45 : 328,749.08 = 69,408.50 : x
  2. Step 2: Convert to fraction form
    219,168.45/328,749.08 = 69,408.50/x
  3. Step 3: Cross multiply
    219,168.45x = 328,749.08 × 69,408.50
  4. Step 4: Simplify right side
    219,168.45x = 22,817,980,519.18
  5. Step 5: Solve for x
    x = 22,817,980,519.18/219,168.45
  6. Step 6: Final answer
    x = 104,111.61

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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.