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Finding the Fourth Proportional to 85,650.75, 128,526.75 and 47,731.68

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Solution

The fourth proportional to 85,650.75, 128,526.75 and 47,731.68 is: 71,625.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,650.75 : 128,526.75 = 47,731.68 : x
  2. Step 2: Convert to fraction form
    85,650.75/128,526.75 = 47,731.68/x
  3. Step 3: Cross multiply
    85,650.75x = 128,526.75 × 47,731.68
  4. Step 4: Simplify right side
    85,650.75x = 6,134,797,702.44
  5. Step 5: Solve for x
    x = 6,134,797,702.44/85,650.75
  6. Step 6: Final answer
    x = 71,625.73

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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.