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Finding the Fourth Proportional to 128,486.80, 192,449.52 and 53,379.22

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Solution

The fourth proportional to 128,486.80, 192,449.52 and 53,379.22 is: 79,952.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,486.80 : 192,449.52 = 53,379.22 : x
  2. Step 2: Convert to fraction form
    128,486.80/192,449.52 = 53,379.22/x
  3. Step 3: Cross multiply
    128,486.80x = 192,449.52 × 53,379.22
  4. Step 4: Simplify right side
    128,486.80x = 10,272,805,266.97
  5. Step 5: Solve for x
    x = 10,272,805,266.97/128,486.80
  6. Step 6: Final answer
    x = 79,952.22

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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.