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Finding the Fourth Proportional to 78,179.79, 117,269.79 and 54,910.11

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Solution

The fourth proportional to 78,179.79, 117,269.79 and 54,910.11 is: 82,365.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,179.79 : 117,269.79 = 54,910.11 : x
  2. Step 2: Convert to fraction form
    78,179.79/117,269.79 = 54,910.11/x
  3. Step 3: Cross multiply
    78,179.79x = 117,269.79 × 54,910.11
  4. Step 4: Simplify right side
    78,179.79x = 6,439,297,068.58
  5. Step 5: Solve for x
    x = 6,439,297,068.58/78,179.79
  6. Step 6: Final answer
    x = 82,365.24

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1.5x scale

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.