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Finding the Fourth Proportional to 66,516, 99,780.48 and 17,268

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Solution

The fourth proportional to 66,516, 99,780.48 and 17,268 is: 25,903.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,516 : 99,780.48 = 17,268 : x
  2. Step 2: Convert to fraction form
    66,516/99,780.48 = 17,268/x
  3. Step 3: Cross multiply
    66,516x = 99,780.48 × 17,268
  4. Step 4: Simplify right side
    66,516x = 1,723,009,328.64
  5. Step 5: Solve for x
    x = 1,723,009,328.64/66,516
  6. Step 6: Final answer
    x = 25,903.68

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.