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Finding the Fourth Proportional to 279,093.61, 385,137.56 and 158,243.07

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Solution

The fourth proportional to 279,093.61, 385,137.56 and 158,243.07 is: 218,368.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,093.61 : 385,137.56 = 158,243.07 : x
  2. Step 2: Convert to fraction form
    279,093.61/385,137.56 = 158,243.07/x
  3. Step 3: Cross multiply
    279,093.61x = 385,137.56 × 158,243.07
  4. Step 4: Simplify right side
    279,093.61x = 60,945,349,866.71
  5. Step 5: Solve for x
    x = 60,945,349,866.71/279,093.61
  6. Step 6: Final answer
    x = 218,368.85

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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.