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Finding the Fourth Proportional to 66,210, 91,369.80 and 36,402

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Solution

The fourth proportional to 66,210, 91,369.80 and 36,402 is: 50,234.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,210 : 91,369.80 = 36,402 : x
  2. Step 2: Convert to fraction form
    66,210/91,369.80 = 36,402/x
  3. Step 3: Cross multiply
    66,210x = 91,369.80 × 36,402
  4. Step 4: Simplify right side
    66,210x = 3,326,043,459.60
  5. Step 5: Solve for x
    x = 3,326,043,459.60/66,210
  6. Step 6: Final answer
    x = 50,234.76

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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.