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Finding the Fourth Proportional to 66,655.64, 91,990.49 and 37,984.07

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Solution

The fourth proportional to 66,655.64, 91,990.49 and 37,984.07 is: 52,421.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,655.64 : 91,990.49 = 37,984.07 : x
  2. Step 2: Convert to fraction form
    66,655.64/91,990.49 = 37,984.07/x
  3. Step 3: Cross multiply
    66,655.64x = 91,990.49 × 37,984.07
  4. Step 4: Simplify right side
    66,655.64x = 3,494,173,251.55
  5. Step 5: Solve for x
    x = 3,494,173,251.55/66,655.64
  6. Step 6: Final answer
    x = 52,421.27

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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.