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Finding the Fourth Proportional to 66,505.51, 91,748.64 and 43,815.39

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Solution

The fourth proportional to 66,505.51, 91,748.64 and 43,815.39 is: 60,446.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,505.51 : 91,748.64 = 43,815.39 : x
  2. Step 2: Convert to fraction form
    66,505.51/91,748.64 = 43,815.39/x
  3. Step 3: Cross multiply
    66,505.51x = 91,748.64 × 43,815.39
  4. Step 4: Simplify right side
    66,505.51x = 4,020,002,443.57
  5. Step 5: Solve for x
    x = 4,020,002,443.57/66,505.51
  6. Step 6: Final answer
    x = 60,446.16

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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.