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Finding the Fourth Proportional to 66,587.50, 91,890.75 and 36,781.42

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Solution

The fourth proportional to 66,587.50, 91,890.75 and 36,781.42 is: 50,758.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,587.50 : 91,890.75 = 36,781.42 : x
  2. Step 2: Convert to fraction form
    66,587.50/91,890.75 = 36,781.42/x
  3. Step 3: Cross multiply
    66,587.50x = 91,890.75 × 36,781.42
  4. Step 4: Simplify right side
    66,587.50x = 3,379,872,269.87
  5. Step 5: Solve for x
    x = 3,379,872,269.87/66,587.50
  6. Step 6: Final answer
    x = 50,758.36

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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.