Home / 85,519.60-128,279.40-54,026.80

Finding the Fourth Proportional to 85,519.60, 128,279.40 and 54,026.80

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Solution

The fourth proportional to 85,519.60, 128,279.40 and 54,026.80 is: 81,040.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,519.60 : 128,279.40 = 54,026.80 : x
  2. Step 2: Convert to fraction form
    85,519.60/128,279.40 = 54,026.80/x
  3. Step 3: Cross multiply
    85,519.60x = 128,279.40 × 54,026.80
  4. Step 4: Simplify right side
    85,519.60x = 6,930,525,487.92
  5. Step 5: Solve for x
    x = 6,930,525,487.92/85,519.60
  6. Step 6: Final answer
    x = 81,040.20

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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.