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Finding the Fourth Proportional to 75,367.85, 113,051.77 and 28,620.72

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Solution

The fourth proportional to 75,367.85, 113,051.77 and 28,620.72 is: 42,931.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,367.85 : 113,051.77 = 28,620.72 : x
  2. Step 2: Convert to fraction form
    75,367.85/113,051.77 = 28,620.72/x
  3. Step 3: Cross multiply
    75,367.85x = 113,051.77 × 28,620.72
  4. Step 4: Simplify right side
    75,367.85x = 3,235,622,983.12
  5. Step 5: Solve for x
    x = 3,235,622,983.12/75,367.85
  6. Step 6: Final answer
    x = 42,931.08

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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.