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Finding the Fourth Proportional to 123,650, 170,512.80 and 109,995.56

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Solution

The fourth proportional to 123,650, 170,512.80 and 109,995.56 is: 151,683.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,650 : 170,512.80 = 109,995.56 : x
  2. Step 2: Convert to fraction form
    123,650/170,512.80 = 109,995.56/x
  3. Step 3: Cross multiply
    123,650x = 170,512.80 × 109,995.56
  4. Step 4: Simplify right side
    123,650x = 18,755,650,923.17
  5. Step 5: Solve for x
    x = 18,755,650,923.17/123,650
  6. Step 6: Final answer
    x = 151,683.39

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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.