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Finding the Fourth Proportional to 258,013.11, 356,025.81 and 143,276.11

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Solution

The fourth proportional to 258,013.11, 356,025.81 and 143,276.11 is: 197,703.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,013.11 : 356,025.81 = 143,276.11 : x
  2. Step 2: Convert to fraction form
    258,013.11/356,025.81 = 143,276.11/x
  3. Step 3: Cross multiply
    258,013.11x = 356,025.81 × 143,276.11
  4. Step 4: Simplify right side
    258,013.11x = 51,009,993,116.40
  5. Step 5: Solve for x
    x = 51,009,993,116.40/258,013.11
  6. Step 6: Final answer
    x = 197,703.11

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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.