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Finding the Fourth Proportional to 138,124.72, 207,297.80 and 71,583.87

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Solution

The fourth proportional to 138,124.72, 207,297.80 and 71,583.87 is: 107,433.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,124.72 : 207,297.80 = 71,583.87 : x
  2. Step 2: Convert to fraction form
    138,124.72/207,297.80 = 71,583.87/x
  3. Step 3: Cross multiply
    138,124.72x = 207,297.80 × 71,583.87
  4. Step 4: Simplify right side
    138,124.72x = 14,839,179,454.37
  5. Step 5: Solve for x
    x = 14,839,179,454.37/138,124.72
  6. Step 6: Final answer
    x = 107,433.19

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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.