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Finding the Fourth Proportional to 93,556.80, 140,680.80 and 78,350.40

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Solution

The fourth proportional to 93,556.80, 140,680.80 and 78,350.40 is: 117,815.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,556.80 : 140,680.80 = 78,350.40 : x
  2. Step 2: Convert to fraction form
    93,556.80/140,680.80 = 78,350.40/x
  3. Step 3: Cross multiply
    93,556.80x = 140,680.80 × 78,350.40
  4. Step 4: Simplify right side
    93,556.80x = 11,022,396,952.32
  5. Step 5: Solve for x
    x = 11,022,396,952.32/93,556.80
  6. Step 6: Final answer
    x = 117,815.03

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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.