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Finding the Fourth Proportional to 66,403.53, 91,548.72 and 53,642.34

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Solution

The fourth proportional to 66,403.53, 91,548.72 and 53,642.34 is: 73,955.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,403.53 : 91,548.72 = 53,642.34 : x
  2. Step 2: Convert to fraction form
    66,403.53/91,548.72 = 53,642.34/x
  3. Step 3: Cross multiply
    66,403.53x = 91,548.72 × 53,642.34
  4. Step 4: Simplify right side
    66,403.53x = 4,910,887,564.80
  5. Step 5: Solve for x
    x = 4,910,887,564.80/66,403.53
  6. Step 6: Final answer
    x = 73,955.22

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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.