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Finding the Fourth Proportional to 85,472.97, 128,194.65 and 23,128.89

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Solution

The fourth proportional to 85,472.97, 128,194.65 and 23,128.89 is: 34,689.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,472.97 : 128,194.65 = 23,128.89 : x
  2. Step 2: Convert to fraction form
    85,472.97/128,194.65 = 23,128.89/x
  3. Step 3: Cross multiply
    85,472.97x = 128,194.65 × 23,128.89
  4. Step 4: Simplify right side
    85,472.97x = 2,964,999,958.44
  5. Step 5: Solve for x
    x = 2,964,999,958.44/85,472.97
  6. Step 6: Final answer
    x = 34,689.33

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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.