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Finding the Fourth Proportional to 74,759.60, 112,096.20 and 28,017.20

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Solution

The fourth proportional to 74,759.60, 112,096.20 and 28,017.20 is: 42,009.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,759.60 : 112,096.20 = 28,017.20 : x
  2. Step 2: Convert to fraction form
    74,759.60/112,096.20 = 28,017.20/x
  3. Step 3: Cross multiply
    74,759.60x = 112,096.20 × 28,017.20
  4. Step 4: Simplify right side
    74,759.60x = 3,140,621,654.64
  5. Step 5: Solve for x
    x = 3,140,621,654.64/74,759.60
  6. Step 6: Final answer
    x = 42,009.61

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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.