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Finding the Fourth Proportional to 75,385.72, 113,620.44 and 64,981.32

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Solution

The fourth proportional to 75,385.72, 113,620.44 and 64,981.32 is: 97,939.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,385.72 : 113,620.44 = 64,981.32 : x
  2. Step 2: Convert to fraction form
    75,385.72/113,620.44 = 64,981.32/x
  3. Step 3: Cross multiply
    75,385.72x = 113,620.44 × 64,981.32
  4. Step 4: Simplify right side
    75,385.72x = 7,383,206,170.18
  5. Step 5: Solve for x
    x = 7,383,206,170.18/75,385.72
  6. Step 6: Final answer
    x = 97,939.05

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.