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Finding the Fourth Proportional to 78,044.40, 117,066.60 and 38,629.20

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Solution

The fourth proportional to 78,044.40, 117,066.60 and 38,629.20 is: 57,943.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,044.40 : 117,066.60 = 38,629.20 : x
  2. Step 2: Convert to fraction form
    78,044.40/117,066.60 = 38,629.20/x
  3. Step 3: Cross multiply
    78,044.40x = 117,066.60 × 38,629.20
  4. Step 4: Simplify right side
    78,044.40x = 4,522,189,104.72
  5. Step 5: Solve for x
    x = 4,522,189,104.72/78,044.40
  6. Step 6: Final answer
    x = 57,943.80

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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.