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Finding the Fourth Proportional to 66,390.39, 91,617.78 and 36,176.40

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Solution

The fourth proportional to 66,390.39, 91,617.78 and 36,176.40 is: 49,922.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,390.39 : 91,617.78 = 36,176.40 : x
  2. Step 2: Convert to fraction form
    66,390.39/91,617.78 = 36,176.40/x
  3. Step 3: Cross multiply
    66,390.39x = 91,617.78 × 36,176.40
  4. Step 4: Simplify right side
    66,390.39x = 3,314,401,456.39
  5. Step 5: Solve for x
    x = 3,314,401,456.39/66,390.39
  6. Step 6: Final answer
    x = 49,922.91

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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.