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Finding the Fourth Proportional to 70,958.63, 97,922.61 and 39,128.06

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Solution

The fourth proportional to 70,958.63, 97,922.61 and 39,128.06 is: 53,996.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,958.63 : 97,922.61 = 39,128.06 : x
  2. Step 2: Convert to fraction form
    70,958.63/97,922.61 = 39,128.06/x
  3. Step 3: Cross multiply
    70,958.63x = 97,922.61 × 39,128.06
  4. Step 4: Simplify right side
    70,958.63x = 3,831,522,004.24
  5. Step 5: Solve for x
    x = 3,831,522,004.24/70,958.63
  6. Step 6: Final answer
    x = 53,996.56

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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.