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Finding the Fourth Proportional to 66,451.95, 99,690.53 and 21,485.39

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Solution

The fourth proportional to 66,451.95, 99,690.53 and 21,485.39 is: 32,232.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,451.95 : 99,690.53 = 21,485.39 : x
  2. Step 2: Convert to fraction form
    66,451.95/99,690.53 = 21,485.39/x
  3. Step 3: Cross multiply
    66,451.95x = 99,690.53 × 21,485.39
  4. Step 4: Simplify right side
    66,451.95x = 2,141,889,310.48
  5. Step 5: Solve for x
    x = 2,141,889,310.48/66,451.95
  6. Step 6: Final answer
    x = 32,232.15

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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.