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Finding the Fourth Proportional to 85,676.40, 128,415.24 and 50,645.52

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Solution

The fourth proportional to 85,676.40, 128,415.24 and 50,645.52 is: 75,909.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,676.40 : 128,415.24 = 50,645.52 : x
  2. Step 2: Convert to fraction form
    85,676.40/128,415.24 = 50,645.52/x
  3. Step 3: Cross multiply
    85,676.40x = 128,415.24 × 50,645.52
  4. Step 4: Simplify right side
    85,676.40x = 6,503,656,605.72
  5. Step 5: Solve for x
    x = 6,503,656,605.72/85,676.40
  6. Step 6: Final answer
    x = 75,909.55

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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.