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Finding the Fourth Proportional to 70,918.08, 97,866.63 and 39,086.97

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Solution

The fourth proportional to 70,918.08, 97,866.63 and 39,086.97 is: 53,939.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,918.08 : 97,866.63 = 39,086.97 : x
  2. Step 2: Convert to fraction form
    70,918.08/97,866.63 = 39,086.97/x
  3. Step 3: Cross multiply
    70,918.08x = 97,866.63 × 39,086.97
  4. Step 4: Simplify right side
    70,918.08x = 3,825,310,030.81
  5. Step 5: Solve for x
    x = 3,825,310,030.81/70,918.08
  6. Step 6: Final answer
    x = 53,939.84

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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.