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Finding the Fourth Proportional to 66,405.53, 91,551.48 and 53,644.34

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Solution

The fourth proportional to 66,405.53, 91,551.48 and 53,644.34 is: 73,957.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,405.53 : 91,551.48 = 53,644.34 : x
  2. Step 2: Convert to fraction form
    66,405.53/91,551.48 = 53,644.34/x
  3. Step 3: Cross multiply
    66,405.53x = 91,551.48 × 53,644.34
  4. Step 4: Simplify right side
    66,405.53x = 4,911,218,720.62
  5. Step 5: Solve for x
    x = 4,911,218,720.62/66,405.53
  6. Step 6: Final answer
    x = 73,957.98

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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.