Home / 85,839.20-128,758.80-82,558.70

Finding the Fourth Proportional to 85,839.20, 128,758.80 and 82,558.70

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Solution

The fourth proportional to 85,839.20, 128,758.80 and 82,558.70 is: 123,838.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,839.20 : 128,758.80 = 82,558.70 : x
  2. Step 2: Convert to fraction form
    85,839.20/128,758.80 = 82,558.70/x
  3. Step 3: Cross multiply
    85,839.20x = 128,758.80 × 82,558.70
  4. Step 4: Simplify right side
    85,839.20x = 10,630,159,141.56
  5. Step 5: Solve for x
    x = 10,630,159,141.56/85,839.20
  6. Step 6: Final answer
    x = 123,838.05

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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.