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Finding the Fourth Proportional to 66,578.80, 99,161.75 and 66,256.87

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Solution

The fourth proportional to 66,578.80, 99,161.75 and 66,256.87 is: 98,682.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,578.80 : 99,161.75 = 66,256.87 : x
  2. Step 2: Convert to fraction form
    66,578.80/99,161.75 = 66,256.87/x
  3. Step 3: Cross multiply
    66,578.80x = 99,161.75 × 66,256.87
  4. Step 4: Simplify right side
    66,578.80x = 6,570,147,178.72
  5. Step 5: Solve for x
    x = 6,570,147,178.72/66,578.80
  6. Step 6: Final answer
    x = 98,682.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.