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Finding the Fourth Proportional to 128,533.56, 192,808.49 and 39,779.61

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Solution

The fourth proportional to 128,533.56, 192,808.49 and 39,779.61 is: 59,671.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,533.56 : 192,808.49 = 39,779.61 : x
  2. Step 2: Convert to fraction form
    128,533.56/192,808.49 = 39,779.61/x
  3. Step 3: Cross multiply
    128,533.56x = 192,808.49 × 39,779.61
  4. Step 4: Simplify right side
    128,533.56x = 7,669,846,536.89
  5. Step 5: Solve for x
    x = 7,669,846,536.89/128,533.56
  6. Step 6: Final answer
    x = 59,671.94

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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.