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Finding the Fourth Proportional to 85,648.56, 128,440.92 and 29,472.96

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Solution

The fourth proportional to 85,648.56, 128,440.92 and 29,472.96 is: 44,198.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,648.56 : 128,440.92 = 29,472.96 : x
  2. Step 2: Convert to fraction form
    85,648.56/128,440.92 = 29,472.96/x
  3. Step 3: Cross multiply
    85,648.56x = 128,440.92 × 29,472.96
  4. Step 4: Simplify right side
    85,648.56x = 3,785,534,097.52
  5. Step 5: Solve for x
    x = 3,785,534,097.52/85,648.56
  6. Step 6: Final answer
    x = 44,198.46

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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.