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Finding the Fourth Proportional to 123,387.15, 170,274.33 and 66,798.54

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Solution

The fourth proportional to 123,387.15, 170,274.33 and 66,798.54 is: 92,182.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,387.15 : 170,274.33 = 66,798.54 : x
  2. Step 2: Convert to fraction form
    123,387.15/170,274.33 = 66,798.54/x
  3. Step 3: Cross multiply
    123,387.15x = 170,274.33 × 66,798.54
  4. Step 4: Simplify right side
    123,387.15x = 11,374,076,643.48
  5. Step 5: Solve for x
    x = 11,374,076,643.48/123,387.15
  6. Step 6: Final answer
    x = 92,182.02

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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.