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Finding the Fourth Proportional to 123,857.01, 170,926.71 and 70,140.87

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Solution

The fourth proportional to 123,857.01, 170,926.71 and 70,140.87 is: 96,796.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,857.01 : 170,926.71 = 70,140.87 : x
  2. Step 2: Convert to fraction form
    123,857.01/170,926.71 = 70,140.87/x
  3. Step 3: Cross multiply
    123,857.01x = 170,926.71 × 70,140.87
  4. Step 4: Simplify right side
    123,857.01x = 11,988,948,145.64
  5. Step 5: Solve for x
    x = 11,988,948,145.64/123,857.01
  6. Step 6: Final answer
    x = 96,796.69

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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.