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Finding the Fourth Proportional to 70,945.85, 97,906.03 and 39,115.89

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Solution

The fourth proportional to 70,945.85, 97,906.03 and 39,115.89 is: 53,980.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,945.85 : 97,906.03 = 39,115.89 : x
  2. Step 2: Convert to fraction form
    70,945.85/97,906.03 = 39,115.89/x
  3. Step 3: Cross multiply
    70,945.85x = 97,906.03 × 39,115.89
  4. Step 4: Simplify right side
    70,945.85x = 3,829,681,402.03
  5. Step 5: Solve for x
    x = 3,829,681,402.03/70,945.85
  6. Step 6: Final answer
    x = 53,980.34

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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.