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Finding the Fourth Proportional to 66,287.70, 99,236.16 and 43,756.81

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Solution

The fourth proportional to 66,287.70, 99,236.16 and 43,756.81 is: 65,506.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,287.70 : 99,236.16 = 43,756.81 : x
  2. Step 2: Convert to fraction form
    66,287.70/99,236.16 = 43,756.81/x
  3. Step 3: Cross multiply
    66,287.70x = 99,236.16 × 43,756.81
  4. Step 4: Simplify right side
    66,287.70x = 4,342,257,550.16
  5. Step 5: Solve for x
    x = 4,342,257,550.16/66,287.70
  6. Step 6: Final answer
    x = 65,506.23

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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.