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Finding the Fourth Proportional to 85,500, 128,263.78 and 26,335.64

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Solution

The fourth proportional to 85,500, 128,263.78 and 26,335.64 is: 39,507.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,500 : 128,263.78 = 26,335.64 : x
  2. Step 2: Convert to fraction form
    85,500/128,263.78 = 26,335.64/x
  3. Step 3: Cross multiply
    85,500x = 128,263.78 × 26,335.64
  4. Step 4: Simplify right side
    85,500x = 3,377,908,735.12
  5. Step 5: Solve for x
    x = 3,377,908,735.12/85,500
  6. Step 6: Final answer
    x = 39,507.70

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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.