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Finding the Fourth Proportional to 123,507.54, 170,440.47 and 66,918.96

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Solution

The fourth proportional to 123,507.54, 170,440.47 and 66,918.96 is: 92,348.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,507.54 : 170,440.47 = 66,918.96 : x
  2. Step 2: Convert to fraction form
    123,507.54/170,440.47 = 66,918.96/x
  3. Step 3: Cross multiply
    123,507.54x = 170,440.47 × 66,918.96
  4. Step 4: Simplify right side
    123,507.54x = 11,405,698,994.31
  5. Step 5: Solve for x
    x = 11,405,698,994.31/123,507.54
  6. Step 6: Final answer
    x = 92,348.20

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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.