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Finding the Fourth Proportional to 75,268.56, 112,902.90 and 19,112.88

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Solution

The fourth proportional to 75,268.56, 112,902.90 and 19,112.88 is: 28,669.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,268.56 : 112,902.90 = 19,112.88 : x
  2. Step 2: Convert to fraction form
    75,268.56/112,902.90 = 19,112.88/x
  3. Step 3: Cross multiply
    75,268.56x = 112,902.90 × 19,112.88
  4. Step 4: Simplify right side
    75,268.56x = 2,157,899,931.06
  5. Step 5: Solve for x
    x = 2,157,899,931.06/75,268.56
  6. Step 6: Final answer
    x = 28,669.34

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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.