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Finding the Fourth Proportional to 123,143.78, 169,938.41 and 66,555.16

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Solution

The fourth proportional to 123,143.78, 169,938.41 and 66,555.16 is: 91,846.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,143.78 : 169,938.41 = 66,555.16 : x
  2. Step 2: Convert to fraction form
    123,143.78/169,938.41 = 66,555.16/x
  3. Step 3: Cross multiply
    123,143.78x = 169,938.41 × 66,555.16
  4. Step 4: Simplify right side
    123,143.78x = 11,310,277,310.07
  5. Step 5: Solve for x
    x = 11,310,277,310.07/123,143.78
  6. Step 6: Final answer
    x = 91,846.11

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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.