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Finding the Fourth Proportional to 61,173.10, 91,759.65 and 43,458.40

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Solution

The fourth proportional to 61,173.10, 91,759.65 and 43,458.40 is: 65,187.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,173.10 : 91,759.65 = 43,458.40 : x
  2. Step 2: Convert to fraction form
    61,173.10/91,759.65 = 43,458.40/x
  3. Step 3: Cross multiply
    61,173.10x = 91,759.65 × 43,458.40
  4. Step 4: Simplify right side
    61,173.10x = 3,987,727,573.56
  5. Step 5: Solve for x
    x = 3,987,727,573.56/61,173.10
  6. Step 6: Final answer
    x = 65,187.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.