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Finding the Fourth Proportional to 123,788.60, 185,682.90 and 115,915.40

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Solution

The fourth proportional to 123,788.60, 185,682.90 and 115,915.40 is: 173,873.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,788.60 : 185,682.90 = 115,915.40 : x
  2. Step 2: Convert to fraction form
    123,788.60/185,682.90 = 115,915.40/x
  3. Step 3: Cross multiply
    123,788.60x = 185,682.90 × 115,915.40
  4. Step 4: Simplify right side
    123,788.60x = 21,523,507,626.66
  5. Step 5: Solve for x
    x = 21,523,507,626.66/123,788.60
  6. Step 6: Final answer
    x = 173,873.10

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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.