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Finding the Fourth Proportional to 143,873.51, 198,670.81 and 90,250.70

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Solution

The fourth proportional to 143,873.51, 198,670.81 and 90,250.70 is: 124,624.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,873.51 : 198,670.81 = 90,250.70 : x
  2. Step 2: Convert to fraction form
    143,873.51/198,670.81 = 90,250.70/x
  3. Step 3: Cross multiply
    143,873.51x = 198,670.81 × 90,250.70
  4. Step 4: Simplify right side
    143,873.51x = 17,930,179,672.07
  5. Step 5: Solve for x
    x = 17,930,179,672.07/143,873.51
  6. Step 6: Final answer
    x = 124,624.61

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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.