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Finding the Fourth Proportional to 64,821.94, 89,478.88 and 43,613.51

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Solution

The fourth proportional to 64,821.94, 89,478.88 and 43,613.51 is: 60,203.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,821.94 : 89,478.88 = 43,613.51 : x
  2. Step 2: Convert to fraction form
    64,821.94/89,478.88 = 43,613.51/x
  3. Step 3: Cross multiply
    64,821.94x = 89,478.88 × 43,613.51
  4. Step 4: Simplify right side
    64,821.94x = 3,902,487,471.24
  5. Step 5: Solve for x
    x = 3,902,487,471.24/64,821.94
  6. Step 6: Final answer
    x = 60,203.19

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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.