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Finding the Fourth Proportional to 66,508.80, 91,779.30 and 36,293.38

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Solution

The fourth proportional to 66,508.80, 91,779.30 and 36,293.38 is: 50,083.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,508.80 : 91,779.30 = 36,293.38 : x
  2. Step 2: Convert to fraction form
    66,508.80/91,779.30 = 36,293.38/x
  3. Step 3: Cross multiply
    66,508.80x = 91,779.30 × 36,293.38
  4. Step 4: Simplify right side
    66,508.80x = 3,330,981,011.03
  5. Step 5: Solve for x
    x = 3,330,981,011.03/66,508.80
  6. Step 6: Final answer
    x = 50,083.31

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1.5x scale

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.