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Finding the Fourth Proportional to 64,874.25, 89,480.03 and 42,170.90

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Solution

The fourth proportional to 64,874.25, 89,480.03 and 42,170.90 is: 58,165.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,874.25 : 89,480.03 = 42,170.90 : x
  2. Step 2: Convert to fraction form
    64,874.25/89,480.03 = 42,170.90/x
  3. Step 3: Cross multiply
    64,874.25x = 89,480.03 × 42,170.90
  4. Step 4: Simplify right side
    64,874.25x = 3,773,452,738.87
  5. Step 5: Solve for x
    x = 3,773,452,738.87/64,874.25
  6. Step 6: Final answer
    x = 58,165.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.