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Finding the Fourth Proportional to 117,020.79, 161,488.04 and 63,305.64

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Solution

The fourth proportional to 117,020.79, 161,488.04 and 63,305.64 is: 87,361.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,020.79 : 161,488.04 = 63,305.64 : x
  2. Step 2: Convert to fraction form
    117,020.79/161,488.04 = 63,305.64/x
  3. Step 3: Cross multiply
    117,020.79x = 161,488.04 × 63,305.64
  4. Step 4: Simplify right side
    117,020.79x = 10,223,103,408.02
  5. Step 5: Solve for x
    x = 10,223,103,408.02/117,020.79
  6. Step 6: Final answer
    x = 87,361.43

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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.