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Finding the Fourth Proportional to 74,750.68, 112,139.84 and 21,440.42

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Solution

The fourth proportional to 74,750.68, 112,139.84 and 21,440.42 is: 32,164.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,750.68 : 112,139.84 = 21,440.42 : x
  2. Step 2: Convert to fraction form
    74,750.68/112,139.84 = 21,440.42/x
  3. Step 3: Cross multiply
    74,750.68x = 112,139.84 × 21,440.42
  4. Step 4: Simplify right side
    74,750.68x = 2,404,325,268.33
  5. Step 5: Solve for x
    x = 2,404,325,268.33/74,750.68
  6. Step 6: Final answer
    x = 32,164.59

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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.