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Finding the Fourth Proportional to 85,207.80, 127,830.90 and 50,129.40

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Solution

The fourth proportional to 85,207.80, 127,830.90 and 50,129.40 is: 75,205.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,207.80 : 127,830.90 = 50,129.40 : x
  2. Step 2: Convert to fraction form
    85,207.80/127,830.90 = 50,129.40/x
  3. Step 3: Cross multiply
    85,207.80x = 127,830.90 × 50,129.40
  4. Step 4: Simplify right side
    85,207.80x = 6,408,086,318.46
  5. Step 5: Solve for x
    x = 6,408,086,318.46/85,207.80
  6. Step 6: Final answer
    x = 75,205.40

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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.