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Finding the Fourth Proportional to 128,656.68, 192,975.30 and 35,169.72

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Solution

The fourth proportional to 128,656.68, 192,975.30 and 35,169.72 is: 52,751.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,656.68 : 192,975.30 = 35,169.72 : x
  2. Step 2: Convert to fraction form
    128,656.68/192,975.30 = 35,169.72/x
  3. Step 3: Cross multiply
    128,656.68x = 192,975.30 × 35,169.72
  4. Step 4: Simplify right side
    128,656.68x = 6,786,887,267.92
  5. Step 5: Solve for x
    x = 6,786,887,267.92/128,656.68
  6. Step 6: Final answer
    x = 52,751.92

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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.