Home / 128,558.72-192,891.91-56,474.46

Finding the Fourth Proportional to 128,558.72, 192,891.91 and 56,474.46

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Solution

The fourth proportional to 128,558.72, 192,891.91 and 56,474.46 is: 84,735.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,558.72 : 192,891.91 = 56,474.46 : x
  2. Step 2: Convert to fraction form
    128,558.72/192,891.91 = 56,474.46/x
  3. Step 3: Cross multiply
    128,558.72x = 192,891.91 × 56,474.46
  4. Step 4: Simplify right side
    128,558.72x = 10,893,465,802.87
  5. Step 5: Solve for x
    x = 10,893,465,802.87/128,558.72
  6. Step 6: Final answer
    x = 84,735.33

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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.