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Finding the Fourth Proportional to 128,349, 192,601.27 and 54,477

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Solution

The fourth proportional to 128,349, 192,601.27 and 54,477 is: 81,748.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,349 : 192,601.27 = 54,477 : x
  2. Step 2: Convert to fraction form
    128,349/192,601.27 = 54,477/x
  3. Step 3: Cross multiply
    128,349x = 192,601.27 × 54,477
  4. Step 4: Simplify right side
    128,349x = 10,492,339,385.79
  5. Step 5: Solve for x
    x = 10,492,339,385.79/128,349
  6. Step 6: Final answer
    x = 81,748.51

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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.