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Finding the Fourth Proportional to 145,574.70, 200,896.14 and 81,912.49

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Solution

The fourth proportional to 145,574.70, 200,896.14 and 81,912.49 is: 113,040.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,574.70 : 200,896.14 = 81,912.49 : x
  2. Step 2: Convert to fraction form
    145,574.70/200,896.14 = 81,912.49/x
  3. Step 3: Cross multiply
    145,574.70x = 200,896.14 × 81,912.49
  4. Step 4: Simplify right side
    145,574.70x = 16,455,903,058.79
  5. Step 5: Solve for x
    x = 16,455,903,058.79/145,574.70
  6. Step 6: Final answer
    x = 113,040.95

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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.