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Finding the Fourth Proportional to 123,507.79, 170,440.79 and 66,919.17

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Solution

The fourth proportional to 123,507.79, 170,440.79 and 66,919.17 is: 92,348.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,507.79 : 170,440.79 = 66,919.17 : x
  2. Step 2: Convert to fraction form
    123,507.79/170,440.79 = 66,919.17/x
  3. Step 3: Cross multiply
    123,507.79x = 170,440.79 × 66,919.17
  4. Step 4: Simplify right side
    123,507.79x = 11,405,756,200.94
  5. Step 5: Solve for x
    x = 11,405,756,200.94/123,507.79
  6. Step 6: Final answer
    x = 92,348.48

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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.