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Finding the Fourth Proportional to 123,355.94, 170,231.01 and 66,767.54

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Solution

The fourth proportional to 123,355.94, 170,231.01 and 66,767.54 is: 92,139.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,355.94 : 170,231.01 = 66,767.54 : x
  2. Step 2: Convert to fraction form
    123,355.94/170,231.01 = 66,767.54/x
  3. Step 3: Cross multiply
    123,355.94x = 170,231.01 × 66,767.54
  4. Step 4: Simplify right side
    123,355.94x = 11,365,905,769.42
  5. Step 5: Solve for x
    x = 11,365,905,769.42/123,355.94
  6. Step 6: Final answer
    x = 92,139.10

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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.