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Finding the Fourth Proportional to 85,700.52, 128,556.78 and 26,528.40

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Solution

The fourth proportional to 85,700.52, 128,556.78 and 26,528.40 is: 39,794.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,700.52 : 128,556.78 = 26,528.40 : x
  2. Step 2: Convert to fraction form
    85,700.52/128,556.78 = 26,528.40/x
  3. Step 3: Cross multiply
    85,700.52x = 128,556.78 × 26,528.40
  4. Step 4: Simplify right side
    85,700.52x = 3,410,405,682.55
  5. Step 5: Solve for x
    x = 3,410,405,682.55/85,700.52
  6. Step 6: Final answer
    x = 39,794.46

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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.