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Finding the Fourth Proportional to 128,628.55, 192,942.92 and 53,707.83

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Solution

The fourth proportional to 128,628.55, 192,942.92 and 53,707.83 is: 80,561.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,628.55 : 192,942.92 = 53,707.83 : x
  2. Step 2: Convert to fraction form
    128,628.55/192,942.92 = 53,707.83/x
  3. Step 3: Cross multiply
    128,628.55x = 192,942.92 × 53,707.83
  4. Step 4: Simplify right side
    128,628.55x = 10,362,545,547.06
  5. Step 5: Solve for x
    x = 10,362,545,547.06/128,628.55
  6. Step 6: Final answer
    x = 80,561.78

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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.