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Finding the Fourth Proportional to 66,021, 91,108.98 and 36,212.36

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Solution

The fourth proportional to 66,021, 91,108.98 and 36,212.36 is: 49,973.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,021 : 91,108.98 = 36,212.36 : x
  2. Step 2: Convert to fraction form
    66,021/91,108.98 = 36,212.36/x
  3. Step 3: Cross multiply
    66,021x = 91,108.98 × 36,212.36
  4. Step 4: Simplify right side
    66,021x = 3,299,271,182.99
  5. Step 5: Solve for x
    x = 3,299,271,182.99/66,021
  6. Step 6: Final answer
    x = 49,973.06

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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.