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Finding the Fourth Proportional to 143,874, 198,571.77 and 90,205.02

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Solution

The fourth proportional to 143,874, 198,571.77 and 90,205.02 is: 124,499.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,874 : 198,571.77 = 90,205.02 : x
  2. Step 2: Convert to fraction form
    143,874/198,571.77 = 90,205.02/x
  3. Step 3: Cross multiply
    143,874x = 198,571.77 × 90,205.02
  4. Step 4: Simplify right side
    143,874x = 17,912,170,484.29
  5. Step 5: Solve for x
    x = 17,912,170,484.29/143,874
  6. Step 6: Final answer
    x = 124,499.01

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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.