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Finding the Fourth Proportional to 92,786.80, 128,046.14 and 50,345.30

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Solution

The fourth proportional to 92,786.80, 128,046.14 and 50,345.30 is: 69,476.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,786.80 : 128,046.14 = 50,345.30 : x
  2. Step 2: Convert to fraction form
    92,786.80/128,046.14 = 50,345.30/x
  3. Step 3: Cross multiply
    92,786.80x = 128,046.14 × 50,345.30
  4. Step 4: Simplify right side
    92,786.80x = 6,446,521,332.14
  5. Step 5: Solve for x
    x = 6,446,521,332.14/92,786.80
  6. Step 6: Final answer
    x = 69,476.71

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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.