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Finding the Fourth Proportional to 123,491.69, 170,419.35 and 66,903.07

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Solution

The fourth proportional to 123,491.69, 170,419.35 and 66,903.07 is: 92,326.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,491.69 : 170,419.35 = 66,903.07 : x
  2. Step 2: Convert to fraction form
    123,491.69/170,419.35 = 66,903.07/x
  3. Step 3: Cross multiply
    123,491.69x = 170,419.35 × 66,903.07
  4. Step 4: Simplify right side
    123,491.69x = 11,401,577,527.24
  5. Step 5: Solve for x
    x = 11,401,577,527.24/123,491.69
  6. Step 6: Final answer
    x = 92,326.68

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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.