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Finding the Fourth Proportional to 85,391.76, 128,103.96 and 26,216.88

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Solution

The fourth proportional to 85,391.76, 128,103.96 and 26,216.88 is: 39,330.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,391.76 : 128,103.96 = 26,216.88 : x
  2. Step 2: Convert to fraction form
    85,391.76/128,103.96 = 26,216.88/x
  3. Step 3: Cross multiply
    85,391.76x = 128,103.96 × 26,216.88
  4. Step 4: Simplify right side
    85,391.76x = 3,358,486,146.84
  5. Step 5: Solve for x
    x = 3,358,486,146.84/85,391.76
  6. Step 6: Final answer
    x = 39,330.33

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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.