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Finding the Fourth Proportional to 125,161.78, 187,767.16 and 55,040.90

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Solution

The fourth proportional to 125,161.78, 187,767.16 and 55,040.90 is: 82,572.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,161.78 : 187,767.16 = 55,040.90 : x
  2. Step 2: Convert to fraction form
    125,161.78/187,767.16 = 55,040.90/x
  3. Step 3: Cross multiply
    125,161.78x = 187,767.16 × 55,040.90
  4. Step 4: Simplify right side
    125,161.78x = 10,334,873,476.84
  5. Step 5: Solve for x
    x = 10,334,873,476.84/125,161.78
  6. Step 6: Final answer
    x = 82,572.12

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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.