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Finding the Fourth Proportional to 243,915.78, 336,618.54 and 136,483.50

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Solution

The fourth proportional to 243,915.78, 336,618.54 and 136,483.50 is: 188,355.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,915.78 : 336,618.54 = 136,483.50 : x
  2. Step 2: Convert to fraction form
    243,915.78/336,618.54 = 136,483.50/x
  3. Step 3: Cross multiply
    243,915.78x = 336,618.54 × 136,483.50
  4. Step 4: Simplify right side
    243,915.78x = 45,942,876,504.09
  5. Step 5: Solve for x
    x = 45,942,876,504.09/243,915.78
  6. Step 6: Final answer
    x = 188,355.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.