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Finding the Fourth Proportional to 243,721.28, 365,612 and 118,968

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Solution

The fourth proportional to 243,721.28, 365,612 and 118,968 is: 178,466.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,721.28 : 365,612 = 118,968 : x
  2. Step 2: Convert to fraction form
    243,721.28/365,612 = 118,968/x
  3. Step 3: Cross multiply
    243,721.28x = 365,612 × 118,968
  4. Step 4: Simplify right side
    243,721.28x = 43,496,128,416
  5. Step 5: Solve for x
    x = 43,496,128,416/243,721.28
  6. Step 6: Final answer
    x = 178,466.68

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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.