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Finding the Fourth Proportional to 128,107.20, 192,218.40 and 57,950.40

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Solution

The fourth proportional to 128,107.20, 192,218.40 and 57,950.40 is: 86,951.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,107.20 : 192,218.40 = 57,950.40 : x
  2. Step 2: Convert to fraction form
    128,107.20/192,218.40 = 57,950.40/x
  3. Step 3: Cross multiply
    128,107.20x = 192,218.40 × 57,950.40
  4. Step 4: Simplify right side
    128,107.20x = 11,139,133,167.36
  5. Step 5: Solve for x
    x = 11,139,133,167.36/128,107.20
  6. Step 6: Final answer
    x = 86,951.66

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1.5x scale

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.