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Finding the Fourth Proportional to 85,903.92, 128,871.36 and 26,725.68

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Solution

The fourth proportional to 85,903.92, 128,871.36 and 26,725.68 is: 40,093.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,903.92 : 128,871.36 = 26,725.68 : x
  2. Step 2: Convert to fraction form
    85,903.92/128,871.36 = 26,725.68/x
  3. Step 3: Cross multiply
    85,903.92x = 128,871.36 × 26,725.68
  4. Step 4: Simplify right side
    85,903.92x = 3,444,174,728.52
  5. Step 5: Solve for x
    x = 3,444,174,728.52/85,903.92
  6. Step 6: Final answer
    x = 40,093.34

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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.