Home / 74,765.20-112,140.52-28,021.72

Finding the Fourth Proportional to 74,765.20, 112,140.52 and 28,021.72

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Solution

The fourth proportional to 74,765.20, 112,140.52 and 28,021.72 is: 42,029.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,765.20 : 112,140.52 = 28,021.72 : x
  2. Step 2: Convert to fraction form
    74,765.20/112,140.52 = 28,021.72/x
  3. Step 3: Cross multiply
    74,765.20x = 112,140.52 × 28,021.72
  4. Step 4: Simplify right side
    74,765.20x = 3,142,370,252.09
  5. Step 5: Solve for x
    x = 3,142,370,252.09/74,765.20
  6. Step 6: Final answer
    x = 42,029.85

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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.