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Finding the Fourth Proportional to 76,620.22, 114,930.35 and 21,216.22

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Solution

The fourth proportional to 76,620.22, 114,930.35 and 21,216.22 is: 31,824.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,620.22 : 114,930.35 = 21,216.22 : x
  2. Step 2: Convert to fraction form
    76,620.22/114,930.35 = 21,216.22/x
  3. Step 3: Cross multiply
    76,620.22x = 114,930.35 × 21,216.22
  4. Step 4: Simplify right side
    76,620.22x = 2,438,387,590.28
  5. Step 5: Solve for x
    x = 2,438,387,590.28/76,620.22
  6. Step 6: Final answer
    x = 31,824.34

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1.5x scale

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.