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Finding the Fourth Proportional to 66,585.88, 91,888.51 and 36,779.80

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Solution

The fourth proportional to 66,585.88, 91,888.51 and 36,779.80 is: 50,756.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,585.88 : 91,888.51 = 36,779.80 : x
  2. Step 2: Convert to fraction form
    66,585.88/91,888.51 = 36,779.80/x
  3. Step 3: Cross multiply
    66,585.88x = 91,888.51 × 36,779.80
  4. Step 4: Simplify right side
    66,585.88x = 3,379,640,560.66
  5. Step 5: Solve for x
    x = 3,379,640,560.66/66,585.88
  6. Step 6: Final answer
    x = 50,756.12

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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.