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Finding the Fourth Proportional to 66,789.77, 92,178.41 and 38,495.66

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Solution

The fourth proportional to 66,789.77, 92,178.41 and 38,495.66 is: 53,128.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,789.77 : 92,178.41 = 38,495.66 : x
  2. Step 2: Convert to fraction form
    66,789.77/92,178.41 = 38,495.66/x
  3. Step 3: Cross multiply
    66,789.77x = 92,178.41 × 38,495.66
  4. Step 4: Simplify right side
    66,789.77x = 3,548,468,077.33
  5. Step 5: Solve for x
    x = 3,548,468,077.33/66,789.77
  6. Step 6: Final answer
    x = 53,128.92

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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.