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Finding the Fourth Proportional to 78,871.88, 117,735.87 and 73,018.22

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Solution

The fourth proportional to 78,871.88, 117,735.87 and 73,018.22 is: 108,997.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,871.88 : 117,735.87 = 73,018.22 : x
  2. Step 2: Convert to fraction form
    78,871.88/117,735.87 = 73,018.22/x
  3. Step 3: Cross multiply
    78,871.88x = 117,735.87 × 73,018.22
  4. Step 4: Simplify right side
    78,871.88x = 8,596,863,068.87
  5. Step 5: Solve for x
    x = 8,596,863,068.87/78,871.88
  6. Step 6: Final answer
    x = 108,997.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.