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Finding the Fourth Proportional to 66,336.60, 99,510 and 21,994.80

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Solution

The fourth proportional to 66,336.60, 99,510 and 21,994.80 is: 32,993.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,336.60 : 99,510 = 21,994.80 : x
  2. Step 2: Convert to fraction form
    66,336.60/99,510 = 21,994.80/x
  3. Step 3: Cross multiply
    66,336.60x = 99,510 × 21,994.80
  4. Step 4: Simplify right side
    66,336.60x = 2,188,702,548
  5. Step 5: Solve for x
    x = 2,188,702,548/66,336.60
  6. Step 6: Final answer
    x = 32,993.89

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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.