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Finding the Fourth Proportional to 187,056.78, 280,621.77 and 68,729.10

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Solution

The fourth proportional to 187,056.78, 280,621.77 and 68,729.10 is: 103,107.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,056.78 : 280,621.77 = 68,729.10 : x
  2. Step 2: Convert to fraction form
    187,056.78/280,621.77 = 68,729.10/x
  3. Step 3: Cross multiply
    187,056.78x = 280,621.77 × 68,729.10
  4. Step 4: Simplify right side
    187,056.78x = 19,286,881,692.51
  5. Step 5: Solve for x
    x = 19,286,881,692.51/187,056.78
  6. Step 6: Final answer
    x = 103,107.10

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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.