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Finding the Fourth Proportional to 243,358.20, 365,056.20 and 85,622.04

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Solution

The fourth proportional to 243,358.20, 365,056.20 and 85,622.04 is: 128,439.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,358.20 : 365,056.20 = 85,622.04 : x
  2. Step 2: Convert to fraction form
    243,358.20/365,056.20 = 85,622.04/x
  3. Step 3: Cross multiply
    243,358.20x = 365,056.20 × 85,622.04
  4. Step 4: Simplify right side
    243,358.20x = 31,256,856,558.65
  5. Step 5: Solve for x
    x = 31,256,856,558.65/243,358.20
  6. Step 6: Final answer
    x = 128,439.71

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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.