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Finding the Fourth Proportional to 101,180, 139,618.42 and 55,855.04

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Solution

The fourth proportional to 101,180, 139,618.42 and 55,855.04 is: 77,074.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,180 : 139,618.42 = 55,855.04 : x
  2. Step 2: Convert to fraction form
    101,180/139,618.42 = 55,855.04/x
  3. Step 3: Cross multiply
    101,180x = 139,618.42 × 55,855.04
  4. Step 4: Simplify right side
    101,180x = 7,798,392,433.84
  5. Step 5: Solve for x
    x = 7,798,392,433.84/101,180
  6. Step 6: Final answer
    x = 77,074.45

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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.