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Finding the Fourth Proportional to 115,905.70, 173,858.55 and 71,388.10

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Solution

The fourth proportional to 115,905.70, 173,858.55 and 71,388.10 is: 107,082.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,905.70 : 173,858.55 = 71,388.10 : x
  2. Step 2: Convert to fraction form
    115,905.70/173,858.55 = 71,388.10/x
  3. Step 3: Cross multiply
    115,905.70x = 173,858.55 × 71,388.10
  4. Step 4: Simplify right side
    115,905.70x = 12,411,431,553.26
  5. Step 5: Solve for x
    x = 12,411,431,553.26/115,905.70
  6. Step 6: Final answer
    x = 107,082.15

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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.