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Finding the Fourth Proportional to 228,000.45, 342,000.68 and 85,845.45

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Solution

The fourth proportional to 228,000.45, 342,000.68 and 85,845.45 is: 128,768.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,000.45 : 342,000.68 = 85,845.45 : x
  2. Step 2: Convert to fraction form
    228,000.45/342,000.68 = 85,845.45/x
  3. Step 3: Cross multiply
    228,000.45x = 342,000.68 × 85,845.45
  4. Step 4: Simplify right side
    228,000.45x = 29,359,201,845.68
  5. Step 5: Solve for x
    x = 29,359,201,845.68/228,000.45
  6. Step 6: Final answer
    x = 128,768.18

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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.