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Finding the Fourth Proportional to 81,137.80, 112,055.70 and 62,086.60

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Solution

The fourth proportional to 81,137.80, 112,055.70 and 62,086.60 is: 85,744.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,137.80 : 112,055.70 = 62,086.60 : x
  2. Step 2: Convert to fraction form
    81,137.80/112,055.70 = 62,086.60/x
  3. Step 3: Cross multiply
    81,137.80x = 112,055.70 × 62,086.60
  4. Step 4: Simplify right side
    81,137.80x = 6,957,157,423.62
  5. Step 5: Solve for x
    x = 6,957,157,423.62/81,137.80
  6. Step 6: Final answer
    x = 85,744.96

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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.