Home / 128,182.72-192,137.92-75,616.96

Finding the Fourth Proportional to 128,182.72, 192,137.92 and 75,616.96

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Solution

The fourth proportional to 128,182.72, 192,137.92 and 75,616.96 is: 113,345.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,182.72 : 192,137.92 = 75,616.96 : x
  2. Step 2: Convert to fraction form
    128,182.72/192,137.92 = 75,616.96/x
  3. Step 3: Cross multiply
    128,182.72x = 192,137.92 × 75,616.96
  4. Step 4: Simplify right side
    128,182.72x = 14,528,885,411.12
  5. Step 5: Solve for x
    x = 14,528,885,411.12/128,182.72
  6. Step 6: Final answer
    x = 113,345.12

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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.