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Finding the Fourth Proportional to 70,151.78, 96,804.81 and 39,940.19

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Solution

The fourth proportional to 70,151.78, 96,804.81 and 39,940.19 is: 55,114.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,151.78 : 96,804.81 = 39,940.19 : x
  2. Step 2: Convert to fraction form
    70,151.78/96,804.81 = 39,940.19/x
  3. Step 3: Cross multiply
    70,151.78x = 96,804.81 × 39,940.19
  4. Step 4: Simplify right side
    70,151.78x = 3,866,402,020.29
  5. Step 5: Solve for x
    x = 3,866,402,020.29/70,151.78
  6. Step 6: Final answer
    x = 55,114.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.