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Finding the Fourth Proportional to 81,181.80, 121,772.70 and 58,890.60

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Solution

The fourth proportional to 81,181.80, 121,772.70 and 58,890.60 is: 88,335.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,181.80 : 121,772.70 = 58,890.60 : x
  2. Step 2: Convert to fraction form
    81,181.80/121,772.70 = 58,890.60/x
  3. Step 3: Cross multiply
    81,181.80x = 121,772.70 × 58,890.60
  4. Step 4: Simplify right side
    81,181.80x = 7,171,267,366.62
  5. Step 5: Solve for x
    x = 7,171,267,366.62/81,181.80
  6. Step 6: Final answer
    x = 88,335.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.