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Finding the Fourth Proportional to 81,753.40, 122,630.10 and 56,740.60

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Solution

The fourth proportional to 81,753.40, 122,630.10 and 56,740.60 is: 85,110.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,753.40 : 122,630.10 = 56,740.60 : x
  2. Step 2: Convert to fraction form
    81,753.40/122,630.10 = 56,740.60/x
  3. Step 3: Cross multiply
    81,753.40x = 122,630.10 × 56,740.60
  4. Step 4: Simplify right side
    81,753.40x = 6,958,105,452.06
  5. Step 5: Solve for x
    x = 6,958,105,452.06/81,753.40
  6. Step 6: Final answer
    x = 85,110.90

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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.