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Finding the Fourth Proportional to 123,816.89, 170,940.24 and 75,437.08

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Solution

The fourth proportional to 123,816.89, 170,940.24 and 75,437.08 is: 104,147.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,816.89 : 170,940.24 = 75,437.08 : x
  2. Step 2: Convert to fraction form
    123,816.89/170,940.24 = 75,437.08/x
  3. Step 3: Cross multiply
    123,816.89x = 170,940.24 × 75,437.08
  4. Step 4: Simplify right side
    123,816.89x = 12,895,232,560.10
  5. Step 5: Solve for x
    x = 12,895,232,560.10/123,816.89
  6. Step 6: Final answer
    x = 104,147.61

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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.