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Finding the Fourth Proportional to 71,528.78, 107,281.01 and 18,943.58

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Solution

The fourth proportional to 71,528.78, 107,281.01 and 18,943.58 is: 28,412.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,528.78 : 107,281.01 = 18,943.58 : x
  2. Step 2: Convert to fraction form
    71,528.78/107,281.01 = 18,943.58/x
  3. Step 3: Cross multiply
    71,528.78x = 107,281.01 × 18,943.58
  4. Step 4: Simplify right side
    71,528.78x = 2,032,286,710.98
  5. Step 5: Solve for x
    x = 2,032,286,710.98/71,528.78
  6. Step 6: Final answer
    x = 28,412.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.