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Finding the Fourth Proportional to 61,268.16, 91,860.84 and 21,276.84

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Solution

The fourth proportional to 61,268.16, 91,860.84 and 21,276.84 is: 31,900.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,268.16 : 91,860.84 = 21,276.84 : x
  2. Step 2: Convert to fraction form
    61,268.16/91,860.84 = 21,276.84/x
  3. Step 3: Cross multiply
    61,268.16x = 91,860.84 × 21,276.84
  4. Step 4: Simplify right side
    61,268.16x = 1,954,508,394.95
  5. Step 5: Solve for x
    x = 1,954,508,394.95/61,268.16
  6. Step 6: Final answer
    x = 31,900.88

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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.