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Finding the Fourth Proportional to 66,447.76, 91,623.40 and 54,310.58

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Solution

The fourth proportional to 66,447.76, 91,623.40 and 54,310.58 is: 74,887.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,447.76 : 91,623.40 = 54,310.58 : x
  2. Step 2: Convert to fraction form
    66,447.76/91,623.40 = 54,310.58/x
  3. Step 3: Cross multiply
    66,447.76x = 91,623.40 × 54,310.58
  4. Step 4: Simplify right side
    66,447.76x = 4,976,119,995.57
  5. Step 5: Solve for x
    x = 4,976,119,995.57/66,447.76
  6. Step 6: Final answer
    x = 74,887.70

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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.