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Finding the Fourth Proportional to 66,540.30, 99,810.45 and 53,418.30

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Solution

The fourth proportional to 66,540.30, 99,810.45 and 53,418.30 is: 80,127.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,540.30 : 99,810.45 = 53,418.30 : x
  2. Step 2: Convert to fraction form
    66,540.30/99,810.45 = 53,418.30/x
  3. Step 3: Cross multiply
    66,540.30x = 99,810.45 × 53,418.30
  4. Step 4: Simplify right side
    66,540.30x = 5,331,704,561.24
  5. Step 5: Solve for x
    x = 5,331,704,561.24/66,540.30
  6. Step 6: Final answer
    x = 80,127.45

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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.