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Finding the Fourth Proportional to 120,018.81, 179,986.53 and 66,792.02

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Solution

The fourth proportional to 120,018.81, 179,986.53 and 66,792.02 is: 100,164.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,018.81 : 179,986.53 = 66,792.02 : x
  2. Step 2: Convert to fraction form
    120,018.81/179,986.53 = 66,792.02/x
  3. Step 3: Cross multiply
    120,018.81x = 179,986.53 × 66,792.02
  4. Step 4: Simplify right side
    120,018.81x = 12,021,662,844.58
  5. Step 5: Solve for x
    x = 12,021,662,844.58/120,018.81
  6. Step 6: Final answer
    x = 100,164.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.