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Finding the Fourth Proportional to 85,930.72, 128,895.84 and 23,601.28

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Solution

The fourth proportional to 85,930.72, 128,895.84 and 23,601.28 is: 35,401.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,930.72 : 128,895.84 = 23,601.28 : x
  2. Step 2: Convert to fraction form
    85,930.72/128,895.84 = 23,601.28/x
  3. Step 3: Cross multiply
    85,930.72x = 128,895.84 × 23,601.28
  4. Step 4: Simplify right side
    85,930.72x = 3,042,106,810.68
  5. Step 5: Solve for x
    x = 3,042,106,810.68/85,930.72
  6. Step 6: Final answer
    x = 35,401.85

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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.