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Finding the Fourth Proportional to 139,621.33, 209,519.48 and 56,515.33

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Solution

The fourth proportional to 139,621.33, 209,519.48 and 56,515.33 is: 84,808.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,621.33 : 209,519.48 = 56,515.33 : x
  2. Step 2: Convert to fraction form
    139,621.33/209,519.48 = 56,515.33/x
  3. Step 3: Cross multiply
    139,621.33x = 209,519.48 × 56,515.33
  4. Step 4: Simplify right side
    139,621.33x = 11,841,062,553.63
  5. Step 5: Solve for x
    x = 11,841,062,553.63/139,621.33
  6. Step 6: Final answer
    x = 84,808.41

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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.