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Finding the Fourth Proportional to 101,395.44, 139,926.42 and 55,455.30

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Solution

The fourth proportional to 101,395.44, 139,926.42 and 55,455.30 is: 76,528.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,395.44 : 139,926.42 = 55,455.30 : x
  2. Step 2: Convert to fraction form
    101,395.44/139,926.42 = 55,455.30/x
  3. Step 3: Cross multiply
    101,395.44x = 139,926.42 × 55,455.30
  4. Step 4: Simplify right side
    101,395.44x = 7,759,661,599.03
  5. Step 5: Solve for x
    x = 7,759,661,599.03/101,395.44
  6. Step 6: Final answer
    x = 76,528.70

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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.