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Finding the Fourth Proportional to 84,703.20, 127,200.60 and 82,078.80

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Solution

The fourth proportional to 84,703.20, 127,200.60 and 82,078.80 is: 123,259.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,703.20 : 127,200.60 = 82,078.80 : x
  2. Step 2: Convert to fraction form
    84,703.20/127,200.60 = 82,078.80/x
  3. Step 3: Cross multiply
    84,703.20x = 127,200.60 × 82,078.80
  4. Step 4: Simplify right side
    84,703.20x = 10,440,472,607.28
  5. Step 5: Solve for x
    x = 10,440,472,607.28/84,703.20
  6. Step 6: Final answer
    x = 123,259.48

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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.