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Finding the Fourth Proportional to 78,807.94, 108,795.09 and 60,862.66

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Solution

The fourth proportional to 78,807.94, 108,795.09 and 60,862.66 is: 84,021.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,807.94 : 108,795.09 = 60,862.66 : x
  2. Step 2: Convert to fraction form
    78,807.94/108,795.09 = 60,862.66/x
  3. Step 3: Cross multiply
    78,807.94x = 108,795.09 × 60,862.66
  4. Step 4: Simplify right side
    78,807.94x = 6,621,558,572.34
  5. Step 5: Solve for x
    x = 6,621,558,572.34/78,807.94
  6. Step 6: Final answer
    x = 84,021.46

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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.