Home / 85,519.40-128,084.70-54,026.60

Finding the Fourth Proportional to 85,519.40, 128,084.70 and 54,026.60

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Solution

The fourth proportional to 85,519.40, 128,084.70 and 54,026.60 is: 80,917.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,519.40 : 128,084.70 = 54,026.60 : x
  2. Step 2: Convert to fraction form
    85,519.40/128,084.70 = 54,026.60/x
  3. Step 3: Cross multiply
    85,519.40x = 128,084.70 × 54,026.60
  4. Step 4: Simplify right side
    85,519.40x = 6,919,980,853.02
  5. Step 5: Solve for x
    x = 6,919,980,853.02/85,519.40
  6. Step 6: Final answer
    x = 80,917.09

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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.