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Finding the Fourth Proportional to 78,812.70, 108,801.64 and 60,867.42

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Solution

The fourth proportional to 78,812.70, 108,801.64 and 60,867.42 is: 84,028.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,812.70 : 108,801.64 = 60,867.42 : x
  2. Step 2: Convert to fraction form
    78,812.70/108,801.64 = 60,867.42/x
  3. Step 3: Cross multiply
    78,812.70x = 108,801.64 × 60,867.42
  4. Step 4: Simplify right side
    78,812.70x = 6,622,475,118.57
  5. Step 5: Solve for x
    x = 6,622,475,118.57/78,812.70
  6. Step 6: Final answer
    x = 84,028.02

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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.