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Finding the Fourth Proportional to 143,889.76, 198,693.23 and 90,266.95

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Solution

The fourth proportional to 143,889.76, 198,693.23 and 90,266.95 is: 124,647.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,889.76 : 198,693.23 = 90,266.95 : x
  2. Step 2: Convert to fraction form
    143,889.76/198,693.23 = 90,266.95/x
  3. Step 3: Cross multiply
    143,889.76x = 198,693.23 × 90,266.95
  4. Step 4: Simplify right side
    143,889.76x = 17,935,431,857.75
  5. Step 5: Solve for x
    x = 17,935,431,857.75/143,889.76
  6. Step 6: Final answer
    x = 124,647.03

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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.