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Finding the Fourth Proportional to 55,278.90, 82,929.15 and 21,993.30

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Solution

The fourth proportional to 55,278.90, 82,929.15 and 21,993.30 is: 32,994.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,278.90 : 82,929.15 = 21,993.30 : x
  2. Step 2: Convert to fraction form
    55,278.90/82,929.15 = 21,993.30/x
  3. Step 3: Cross multiply
    55,278.90x = 82,929.15 × 21,993.30
  4. Step 4: Simplify right side
    55,278.90x = 1,823,885,674.70
  5. Step 5: Solve for x
    x = 1,823,885,674.70/55,278.90
  6. Step 6: Final answer
    x = 32,994.25

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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.