Home / 85,902.10-128,853.15-50,823.70

Finding the Fourth Proportional to 85,902.10, 128,853.15 and 50,823.70

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Solution

The fourth proportional to 85,902.10, 128,853.15 and 50,823.70 is: 76,235.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,902.10 : 128,853.15 = 50,823.70 : x
  2. Step 2: Convert to fraction form
    85,902.10/128,853.15 = 50,823.70/x
  3. Step 3: Cross multiply
    85,902.10x = 128,853.15 × 50,823.70
  4. Step 4: Simplify right side
    85,902.10x = 6,548,793,839.66
  5. Step 5: Solve for x
    x = 6,548,793,839.66/85,902.10
  6. Step 6: Final answer
    x = 76,235.55

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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.