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Finding the Fourth Proportional to 115,961.40, 173,942.10 and 56,912.40

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Solution

The fourth proportional to 115,961.40, 173,942.10 and 56,912.40 is: 85,368.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,961.40 : 173,942.10 = 56,912.40 : x
  2. Step 2: Convert to fraction form
    115,961.40/173,942.10 = 56,912.40/x
  3. Step 3: Cross multiply
    115,961.40x = 173,942.10 × 56,912.40
  4. Step 4: Simplify right side
    115,961.40x = 9,899,462,372.04
  5. Step 5: Solve for x
    x = 9,899,462,372.04/115,961.40
  6. Step 6: Final answer
    x = 85,368.60

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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.