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Finding the Fourth Proportional to 123,390.37, 170,278.77 and 66,801.79

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Solution

The fourth proportional to 123,390.37, 170,278.77 and 66,801.79 is: 92,186.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,390.37 : 170,278.77 = 66,801.79 : x
  2. Step 2: Convert to fraction form
    123,390.37/170,278.77 = 66,801.79/x
  3. Step 3: Cross multiply
    123,390.37x = 170,278.77 × 66,801.79
  4. Step 4: Simplify right side
    123,390.37x = 11,374,926,635.00
  5. Step 5: Solve for x
    x = 11,374,926,635.00/123,390.37
  6. Step 6: Final answer
    x = 92,186.50

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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.