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Finding the Fourth Proportional to 70,918.94, 97,866.43 and 39,087.16

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Solution

The fourth proportional to 70,918.94, 97,866.43 and 39,087.16 is: 53,939.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,918.94 : 97,866.43 = 39,087.16 : x
  2. Step 2: Convert to fraction form
    70,918.94/97,866.43 = 39,087.16/x
  3. Step 3: Cross multiply
    70,918.94x = 97,866.43 × 39,087.16
  4. Step 4: Simplify right side
    70,918.94x = 3,825,320,465.65
  5. Step 5: Solve for x
    x = 3,825,320,465.65/70,918.94
  6. Step 6: Final answer
    x = 53,939.33

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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.