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Finding the Fourth Proportional to 66,438, 91,684.44 and 36,630

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Solution

The fourth proportional to 66,438, 91,684.44 and 36,630 is: 50,549.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,438 : 91,684.44 = 36,630 : x
  2. Step 2: Convert to fraction form
    66,438/91,684.44 = 36,630/x
  3. Step 3: Cross multiply
    66,438x = 91,684.44 × 36,630
  4. Step 4: Simplify right side
    66,438x = 3,358,401,037.20
  5. Step 5: Solve for x
    x = 3,358,401,037.20/66,438
  6. Step 6: Final answer
    x = 50,549.40

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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.