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Finding the Fourth Proportional to 123,974.60, 185,961.90 and 118,725.80

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Solution

The fourth proportional to 123,974.60, 185,961.90 and 118,725.80 is: 178,088.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,974.60 : 185,961.90 = 118,725.80 : x
  2. Step 2: Convert to fraction form
    123,974.60/185,961.90 = 118,725.80/x
  3. Step 3: Cross multiply
    123,974.60x = 185,961.90 × 118,725.80
  4. Step 4: Simplify right side
    123,974.60x = 22,078,475,347.02
  5. Step 5: Solve for x
    x = 22,078,475,347.02/123,974.60
  6. Step 6: Final answer
    x = 178,088.70

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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.