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Finding the Fourth Proportional to 123,288.92, 170,137.46 and 66,699.08

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Solution

The fourth proportional to 123,288.92, 170,137.46 and 66,699.08 is: 92,044.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,288.92 : 170,137.46 = 66,699.08 : x
  2. Step 2: Convert to fraction form
    123,288.92/170,137.46 = 66,699.08/x
  3. Step 3: Cross multiply
    123,288.92x = 170,137.46 × 66,699.08
  4. Step 4: Simplify right side
    123,288.92x = 11,348,012,055.54
  5. Step 5: Solve for x
    x = 11,348,012,055.54/123,288.92
  6. Step 6: Final answer
    x = 92,044.05

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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.