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Finding the Fourth Proportional to 187,419.20, 281,031.60 and 69,029.60

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Solution

The fourth proportional to 187,419.20, 281,031.60 and 69,029.60 is: 103,508.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,419.20 : 281,031.60 = 69,029.60 : x
  2. Step 2: Convert to fraction form
    187,419.20/281,031.60 = 69,029.60/x
  3. Step 3: Cross multiply
    187,419.20x = 281,031.60 × 69,029.60
  4. Step 4: Simplify right side
    187,419.20x = 19,399,498,935.36
  5. Step 5: Solve for x
    x = 19,399,498,935.36/187,419.20
  6. Step 6: Final answer
    x = 103,508.60

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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.