Home / 66,463-91,719.75-38,171.32

Finding the Fourth Proportional to 66,463, 91,719.75 and 38,171.32

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Solution

The fourth proportional to 66,463, 91,719.75 and 38,171.32 is: 52,676.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,463 : 91,719.75 = 38,171.32 : x
  2. Step 2: Convert to fraction form
    66,463/91,719.75 = 38,171.32/x
  3. Step 3: Cross multiply
    66,463x = 91,719.75 × 38,171.32
  4. Step 4: Simplify right side
    66,463x = 3,501,063,927.57
  5. Step 5: Solve for x
    x = 3,501,063,927.57/66,463
  6. Step 6: Final answer
    x = 52,676.89

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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.