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Finding the Fourth Proportional to 123,959.40, 185,939.10 and 112,878.60

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Solution

The fourth proportional to 123,959.40, 185,939.10 and 112,878.60 is: 169,317.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,959.40 : 185,939.10 = 112,878.60 : x
  2. Step 2: Convert to fraction form
    123,959.40/185,939.10 = 112,878.60/x
  3. Step 3: Cross multiply
    123,959.40x = 185,939.10 × 112,878.60
  4. Step 4: Simplify right side
    123,959.40x = 20,988,545,293.26
  5. Step 5: Solve for x
    x = 20,988,545,293.26/123,959.40
  6. Step 6: Final answer
    x = 169,317.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.