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Finding the Fourth Proportional to 123,507.54, 170,440.45 and 66,918.92

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Solution

The fourth proportional to 123,507.54, 170,440.45 and 66,918.92 is: 92,348.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,507.54 : 170,440.45 = 66,918.92 : x
  2. Step 2: Convert to fraction form
    123,507.54/170,440.45 = 66,918.92/x
  3. Step 3: Cross multiply
    123,507.54x = 170,440.45 × 66,918.92
  4. Step 4: Simplify right side
    123,507.54x = 11,405,689,986.11
  5. Step 5: Solve for x
    x = 11,405,689,986.11/123,507.54
  6. Step 6: Final answer
    x = 92,348.13

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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.