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Finding the Fourth Proportional to 123,655.69, 170,644.86 and 69,939.56

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Solution

The fourth proportional to 123,655.69, 170,644.86 and 69,939.56 is: 96,516.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,655.69 : 170,644.86 = 69,939.56 : x
  2. Step 2: Convert to fraction form
    123,655.69/170,644.86 = 69,939.56/x
  3. Step 3: Cross multiply
    123,655.69x = 170,644.86 × 69,939.56
  4. Step 4: Simplify right side
    123,655.69x = 11,934,826,424.66
  5. Step 5: Solve for x
    x = 11,934,826,424.66/123,655.69
  6. Step 6: Final answer
    x = 96,516.60

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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.