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Finding the Fourth Proportional to 100,007.74, 137,950.68 and 66,016.90

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Solution

The fourth proportional to 100,007.74, 137,950.68 and 66,016.90 is: 91,063.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,007.74 : 137,950.68 = 66,016.90 : x
  2. Step 2: Convert to fraction form
    100,007.74/137,950.68 = 66,016.90/x
  3. Step 3: Cross multiply
    100,007.74x = 137,950.68 × 66,016.90
  4. Step 4: Simplify right side
    100,007.74x = 9,107,076,246.49
  5. Step 5: Solve for x
    x = 9,107,076,246.49/100,007.74
  6. Step 6: Final answer
    x = 91,063.71

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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.