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Finding the Fourth Proportional to 227,920.40, 341,880.60 and 78,140.60

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Solution

The fourth proportional to 227,920.40, 341,880.60 and 78,140.60 is: 117,210.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    227,920.40 : 341,880.60 = 78,140.60 : x
  2. Step 2: Convert to fraction form
    227,920.40/341,880.60 = 78,140.60/x
  3. Step 3: Cross multiply
    227,920.40x = 341,880.60 × 78,140.60
  4. Step 4: Simplify right side
    227,920.40x = 26,714,755,212.36
  5. Step 5: Solve for x
    x = 26,714,755,212.36/227,920.40
  6. Step 6: Final answer
    x = 117,210.90

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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.