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Finding the Fourth Proportional to 65,245.32, 90,017.49 and 38,394.43

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Solution

The fourth proportional to 65,245.32, 90,017.49 and 38,394.43 is: 52,971.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,245.32 : 90,017.49 = 38,394.43 : x
  2. Step 2: Convert to fraction form
    65,245.32/90,017.49 = 38,394.43/x
  3. Step 3: Cross multiply
    65,245.32x = 90,017.49 × 38,394.43
  4. Step 4: Simplify right side
    65,245.32x = 3,456,170,218.58
  5. Step 5: Solve for x
    x = 3,456,170,218.58/65,245.32
  6. Step 6: Final answer
    x = 52,971.93

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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.