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Finding the Fourth Proportional to 126,805, 174,989.65 and 68,661.46

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Solution

The fourth proportional to 126,805, 174,989.65 and 68,661.46 is: 94,752.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,805 : 174,989.65 = 68,661.46 : x
  2. Step 2: Convert to fraction form
    126,805/174,989.65 = 68,661.46/x
  3. Step 3: Cross multiply
    126,805x = 174,989.65 × 68,661.46
  4. Step 4: Simplify right side
    126,805x = 12,015,044,853.89
  5. Step 5: Solve for x
    x = 12,015,044,853.89/126,805
  6. Step 6: Final answer
    x = 94,752.14

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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.