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Finding the Fourth Proportional to 66,369.72, 91,679.76 and 53,034.48

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Solution

The fourth proportional to 66,369.72, 91,679.76 and 53,034.48 is: 73,259.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,369.72 : 91,679.76 = 53,034.48 : x
  2. Step 2: Convert to fraction form
    66,369.72/91,679.76 = 53,034.48/x
  3. Step 3: Cross multiply
    66,369.72x = 91,679.76 × 53,034.48
  4. Step 4: Simplify right side
    66,369.72x = 4,862,188,398.12
  5. Step 5: Solve for x
    x = 4,862,188,398.12/66,369.72
  6. Step 6: Final answer
    x = 73,259.14

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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.