Home / 85,005.20-127,507.80-80,166.80

Finding the Fourth Proportional to 85,005.20, 127,507.80 and 80,166.80

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Solution

The fourth proportional to 85,005.20, 127,507.80 and 80,166.80 is: 120,250.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,005.20 : 127,507.80 = 80,166.80 : x
  2. Step 2: Convert to fraction form
    85,005.20/127,507.80 = 80,166.80/x
  3. Step 3: Cross multiply
    85,005.20x = 127,507.80 × 80,166.80
  4. Step 4: Simplify right side
    85,005.20x = 10,221,892,301.04
  5. Step 5: Solve for x
    x = 10,221,892,301.04/85,005.20
  6. Step 6: Final answer
    x = 120,250.20

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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.