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Finding the Fourth Proportional to 66,268.40, 99,402.72 and 19,520.72

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Solution

The fourth proportional to 66,268.40, 99,402.72 and 19,520.72 is: 29,281.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,268.40 : 99,402.72 = 19,520.72 : x
  2. Step 2: Convert to fraction form
    66,268.40/99,402.72 = 19,520.72/x
  3. Step 3: Cross multiply
    66,268.40x = 99,402.72 × 19,520.72
  4. Step 4: Simplify right side
    66,268.40x = 1,940,412,664.36
  5. Step 5: Solve for x
    x = 1,940,412,664.36/66,268.40
  6. Step 6: Final answer
    x = 29,281.12

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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.