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Finding the Fourth Proportional to 145,597.98, 200,891.88 and 81,912.54

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Solution

The fourth proportional to 145,597.98, 200,891.88 and 81,912.54 is: 113,020.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,597.98 : 200,891.88 = 81,912.54 : x
  2. Step 2: Convert to fraction form
    145,597.98/200,891.88 = 81,912.54/x
  3. Step 3: Cross multiply
    145,597.98x = 200,891.88 × 81,912.54
  4. Step 4: Simplify right side
    145,597.98x = 16,455,564,156.18
  5. Step 5: Solve for x
    x = 16,455,564,156.18/145,597.98
  6. Step 6: Final answer
    x = 113,020.55

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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.