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Finding the Fourth Proportional to 66,636.37, 99,981.89 and 27,197.47

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Solution

The fourth proportional to 66,636.37, 99,981.89 and 27,197.47 is: 40,807.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,636.37 : 99,981.89 = 27,197.47 : x
  2. Step 2: Convert to fraction form
    66,636.37/99,981.89 = 27,197.47/x
  3. Step 3: Cross multiply
    66,636.37x = 99,981.89 × 27,197.47
  4. Step 4: Simplify right side
    66,636.37x = 2,719,254,697.78
  5. Step 5: Solve for x
    x = 2,719,254,697.78/66,636.37
  6. Step 6: Final answer
    x = 40,807.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.