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Finding the Fourth Proportional to 85,500, 128,250.05 and 23,170.50

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Solution

The fourth proportional to 85,500, 128,250.05 and 23,170.50 is: 34,755.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,500 : 128,250.05 = 23,170.50 : x
  2. Step 2: Convert to fraction form
    85,500/128,250.05 = 23,170.50/x
  3. Step 3: Cross multiply
    85,500x = 128,250.05 × 23,170.50
  4. Step 4: Simplify right side
    85,500x = 2,971,617,667.67
  5. Step 5: Solve for x
    x = 2,971,617,667.67/85,500
  6. Step 6: Final answer
    x = 34,755.76

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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.