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Finding the Fourth Proportional to 85,681.64, 128,522.87 and 26,517.62

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Solution

The fourth proportional to 85,681.64, 128,522.87 and 26,517.62 is: 39,776.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,681.64 : 128,522.87 = 26,517.62 : x
  2. Step 2: Convert to fraction form
    85,681.64/128,522.87 = 26,517.62/x
  3. Step 3: Cross multiply
    85,681.64x = 128,522.87 × 26,517.62
  4. Step 4: Simplify right side
    85,681.64x = 3,408,120,627.97
  5. Step 5: Solve for x
    x = 3,408,120,627.97/85,681.64
  6. Step 6: Final answer
    x = 39,776.56

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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.