Home / 66,481-91,736.58-38,190.76

Finding the Fourth Proportional to 66,481, 91,736.58 and 38,190.76

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Solution

The fourth proportional to 66,481, 91,736.58 and 38,190.76 is: 52,699.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,481 : 91,736.58 = 38,190.76 : x
  2. Step 2: Convert to fraction form
    66,481/91,736.58 = 38,190.76/x
  3. Step 3: Cross multiply
    66,481x = 91,736.58 × 38,190.76
  4. Step 4: Simplify right side
    66,481x = 3,503,489,710.00
  5. Step 5: Solve for x
    x = 3,503,489,710.00/66,481
  6. Step 6: Final answer
    x = 52,699.11

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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.