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Finding the Fourth Proportional to 77,961.80, 116,950.08 and 21,801.90

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Solution

The fourth proportional to 77,961.80, 116,950.08 and 21,801.90 is: 32,704.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,961.80 : 116,950.08 = 21,801.90 : x
  2. Step 2: Convert to fraction form
    77,961.80/116,950.08 = 21,801.90/x
  3. Step 3: Cross multiply
    77,961.80x = 116,950.08 × 21,801.90
  4. Step 4: Simplify right side
    77,961.80x = 2,549,733,949.15
  5. Step 5: Solve for x
    x = 2,549,733,949.15/77,961.80
  6. Step 6: Final answer
    x = 32,704.91

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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.