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Finding the Fourth Proportional to 74,934.68, 112,406.31 and 28,187.96

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Solution

The fourth proportional to 74,934.68, 112,406.31 and 28,187.96 is: 42,283.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,934.68 : 112,406.31 = 28,187.96 : x
  2. Step 2: Convert to fraction form
    74,934.68/112,406.31 = 28,187.96/x
  3. Step 3: Cross multiply
    74,934.68x = 112,406.31 × 28,187.96
  4. Step 4: Simplify right side
    74,934.68x = 3,168,504,008.00
  5. Step 5: Solve for x
    x = 3,168,504,008.00/74,934.68
  6. Step 6: Final answer
    x = 42,283.55

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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.