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Finding the Fourth Proportional to 66,558.58, 99,853.76 and 21,579.95

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Solution

The fourth proportional to 66,558.58, 99,853.76 and 21,579.95 is: 32,375.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,558.58 : 99,853.76 = 21,579.95 : x
  2. Step 2: Convert to fraction form
    66,558.58/99,853.76 = 21,579.95/x
  3. Step 3: Cross multiply
    66,558.58x = 99,853.76 × 21,579.95
  4. Step 4: Simplify right side
    66,558.58x = 2,154,839,451.70
  5. Step 5: Solve for x
    x = 2,154,839,451.70/66,558.58
  6. Step 6: Final answer
    x = 32,375.08

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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.