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Finding the Fourth Proportional to 55,988.01, 83,949.21 and 20,930.40

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Solution

The fourth proportional to 55,988.01, 83,949.21 and 20,930.40 is: 31,383.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,988.01 : 83,949.21 = 20,930.40 : x
  2. Step 2: Convert to fraction form
    55,988.01/83,949.21 = 20,930.40/x
  3. Step 3: Cross multiply
    55,988.01x = 83,949.21 × 20,930.40
  4. Step 4: Simplify right side
    55,988.01x = 1,757,090,544.98
  5. Step 5: Solve for x
    x = 1,757,090,544.98/55,988.01
  6. Step 6: Final answer
    x = 31,383.34

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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.