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Finding the Fourth Proportional to 66,771.68, 92,145 and 38,476.64

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Solution

The fourth proportional to 66,771.68, 92,145 and 38,476.64 is: 53,097.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,771.68 : 92,145 = 38,476.64 : x
  2. Step 2: Convert to fraction form
    66,771.68/92,145 = 38,476.64/x
  3. Step 3: Cross multiply
    66,771.68x = 92,145 × 38,476.64
  4. Step 4: Simplify right side
    66,771.68x = 3,545,429,992.80
  5. Step 5: Solve for x
    x = 3,545,429,992.80/66,771.68
  6. Step 6: Final answer
    x = 53,097.81

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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.