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Finding the Fourth Proportional to 84,807.60, 127,211.40 and 80,530.80

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Solution

The fourth proportional to 84,807.60, 127,211.40 and 80,530.80 is: 120,796.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,807.60 : 127,211.40 = 80,530.80 : x
  2. Step 2: Convert to fraction form
    84,807.60/127,211.40 = 80,530.80/x
  3. Step 3: Cross multiply
    84,807.60x = 127,211.40 × 80,530.80
  4. Step 4: Simplify right side
    84,807.60x = 10,244,435,811.12
  5. Step 5: Solve for x
    x = 10,244,435,811.12/84,807.60
  6. Step 6: Final answer
    x = 120,796.20

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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.