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Finding the Fourth Proportional to 85,771.64, 128,659.08 and 26,609.24

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Solution

The fourth proportional to 85,771.64, 128,659.08 and 26,609.24 is: 39,914.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,771.64 : 128,659.08 = 26,609.24 : x
  2. Step 2: Convert to fraction form
    85,771.64/128,659.08 = 26,609.24/x
  3. Step 3: Cross multiply
    85,771.64x = 128,659.08 × 26,609.24
  4. Step 4: Simplify right side
    85,771.64x = 3,423,520,337.90
  5. Step 5: Solve for x
    x = 3,423,520,337.90/85,771.64
  6. Step 6: Final answer
    x = 39,914.36

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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.