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Finding the Fourth Proportional to 64,943.91, 89,684.49 and 61,405.77

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Solution

The fourth proportional to 64,943.91, 89,684.49 and 61,405.77 is: 84,798.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,943.91 : 89,684.49 = 61,405.77 : x
  2. Step 2: Convert to fraction form
    64,943.91/89,684.49 = 61,405.77/x
  3. Step 3: Cross multiply
    64,943.91x = 89,684.49 × 61,405.77
  4. Step 4: Simplify right side
    64,943.91x = 5,507,145,386.69
  5. Step 5: Solve for x
    x = 5,507,145,386.69/64,943.91
  6. Step 6: Final answer
    x = 84,798.49

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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.