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Finding the Fourth Proportional to 70,991.81, 97,968.71 and 39,160.79

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Solution

The fourth proportional to 70,991.81, 97,968.71 and 39,160.79 is: 54,041.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,991.81 : 97,968.71 = 39,160.79 : x
  2. Step 2: Convert to fraction form
    70,991.81/97,968.71 = 39,160.79/x
  3. Step 3: Cross multiply
    70,991.81x = 97,968.71 × 39,160.79
  4. Step 4: Simplify right side
    70,991.81x = 3,836,531,883.08
  5. Step 5: Solve for x
    x = 3,836,531,883.08/70,991.81
  6. Step 6: Final answer
    x = 54,041.89

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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.