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Finding the Fourth Proportional to 123,855.51, 170,924.64 and 70,139.37

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Solution

The fourth proportional to 123,855.51, 170,924.64 and 70,139.37 is: 96,794.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,855.51 : 170,924.64 = 70,139.37 : x
  2. Step 2: Convert to fraction form
    123,855.51/170,924.64 = 70,139.37/x
  3. Step 3: Cross multiply
    123,855.51x = 170,924.64 × 70,139.37
  4. Step 4: Simplify right side
    123,855.51x = 11,988,546,945.02
  5. Step 5: Solve for x
    x = 11,988,546,945.02/123,855.51
  6. Step 6: Final answer
    x = 96,794.62

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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.