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Finding the Fourth Proportional to 123,616.40, 185,424.60 and 121,429.40

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Solution

The fourth proportional to 123,616.40, 185,424.60 and 121,429.40 is: 182,144.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,616.40 : 185,424.60 = 121,429.40 : x
  2. Step 2: Convert to fraction form
    123,616.40/185,424.60 = 121,429.40/x
  3. Step 3: Cross multiply
    123,616.40x = 185,424.60 × 121,429.40
  4. Step 4: Simplify right side
    123,616.40x = 22,515,997,923.24
  5. Step 5: Solve for x
    x = 22,515,997,923.24/123,616.40
  6. Step 6: Final answer
    x = 182,144.10

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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.