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Finding the Fourth Proportional to 66,752.42, 92,109.26 and 39,889.28

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Solution

The fourth proportional to 66,752.42, 92,109.26 and 39,889.28 is: 55,041.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,752.42 : 92,109.26 = 39,889.28 : x
  2. Step 2: Convert to fraction form
    66,752.42/92,109.26 = 39,889.28/x
  3. Step 3: Cross multiply
    66,752.42x = 92,109.26 × 39,889.28
  4. Step 4: Simplify right side
    66,752.42x = 3,674,172,062.73
  5. Step 5: Solve for x
    x = 3,674,172,062.73/66,752.42
  6. Step 6: Final answer
    x = 55,041.78

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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.