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Finding the Fourth Proportional to 85,636.76, 128,467.26 and 26,477.60

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Solution

The fourth proportional to 85,636.76, 128,467.26 and 26,477.60 is: 39,720.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,636.76 : 128,467.26 = 26,477.60 : x
  2. Step 2: Convert to fraction form
    85,636.76/128,467.26 = 26,477.60/x
  3. Step 3: Cross multiply
    85,636.76x = 128,467.26 × 26,477.60
  4. Step 4: Simplify right side
    85,636.76x = 3,401,504,723.38
  5. Step 5: Solve for x
    x = 3,401,504,723.38/85,636.76
  6. Step 6: Final answer
    x = 39,720.15

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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.