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Finding the Fourth Proportional to 139,795.68, 209,578.70 and 55,519.63

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Solution

The fourth proportional to 139,795.68, 209,578.70 and 55,519.63 is: 83,233.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,795.68 : 209,578.70 = 55,519.63 : x
  2. Step 2: Convert to fraction form
    139,795.68/209,578.70 = 55,519.63/x
  3. Step 3: Cross multiply
    139,795.68x = 209,578.70 × 55,519.63
  4. Step 4: Simplify right side
    139,795.68x = 11,635,731,602.28
  5. Step 5: Solve for x
    x = 11,635,731,602.28/139,795.68
  6. Step 6: Final answer
    x = 83,233.85

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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.