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Finding the Fourth Proportional to 85,559.88, 128,339 and 23,230.38

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Solution

The fourth proportional to 85,559.88, 128,339 and 23,230.38 is: 34,845.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,559.88 : 128,339 = 23,230.38 : x
  2. Step 2: Convert to fraction form
    85,559.88/128,339 = 23,230.38/x
  3. Step 3: Cross multiply
    85,559.88x = 128,339 × 23,230.38
  4. Step 4: Simplify right side
    85,559.88x = 2,981,363,738.82
  5. Step 5: Solve for x
    x = 2,981,363,738.82/85,559.88
  6. Step 6: Final answer
    x = 34,845.35

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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.