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Finding the Fourth Proportional to 61,144.40, 91,716.60 and 43,429.70

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Solution

The fourth proportional to 61,144.40, 91,716.60 and 43,429.70 is: 65,144.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,144.40 : 91,716.60 = 43,429.70 : x
  2. Step 2: Convert to fraction form
    61,144.40/91,716.60 = 43,429.70/x
  3. Step 3: Cross multiply
    61,144.40x = 91,716.60 × 43,429.70
  4. Step 4: Simplify right side
    61,144.40x = 3,983,224,423.02
  5. Step 5: Solve for x
    x = 3,983,224,423.02/61,144.40
  6. Step 6: Final answer
    x = 65,144.55

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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.