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Finding the Fourth Proportional to 123,491.81, 170,418.87 and 66,903.18

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Solution

The fourth proportional to 123,491.81, 170,418.87 and 66,903.18 is: 92,326.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,491.81 : 170,418.87 = 66,903.18 : x
  2. Step 2: Convert to fraction form
    123,491.81/170,418.87 = 66,903.18/x
  3. Step 3: Cross multiply
    123,491.81x = 170,418.87 × 66,903.18
  4. Step 4: Simplify right side
    123,491.81x = 11,401,564,335.01
  5. Step 5: Solve for x
    x = 11,401,564,335.01/123,491.81
  6. Step 6: Final answer
    x = 92,326.49

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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.