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Finding the Fourth Proportional to 92,889.40, 128,198.31 and 55,163.65

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Solution

The fourth proportional to 92,889.40, 128,198.31 and 55,163.65 is: 76,132.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,889.40 : 128,198.31 = 55,163.65 : x
  2. Step 2: Convert to fraction form
    92,889.40/128,198.31 = 55,163.65/x
  3. Step 3: Cross multiply
    92,889.40x = 128,198.31 × 55,163.65
  4. Step 4: Simplify right side
    92,889.40x = 7,071,886,703.43
  5. Step 5: Solve for x
    x = 7,071,886,703.43/92,889.40
  6. Step 6: Final answer
    x = 76,132.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.