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Finding the Fourth Proportional to 85,704.48, 128,575.48 and 25,730.46

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Solution

The fourth proportional to 85,704.48, 128,575.48 and 25,730.46 is: 38,601.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,704.48 : 128,575.48 = 25,730.46 : x
  2. Step 2: Convert to fraction form
    85,704.48/128,575.48 = 25,730.46/x
  3. Step 3: Cross multiply
    85,704.48x = 128,575.48 × 25,730.46
  4. Step 4: Simplify right side
    85,704.48x = 3,308,306,245.12
  5. Step 5: Solve for x
    x = 3,308,306,245.12/85,704.48
  6. Step 6: Final answer
    x = 38,601.32

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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.